experimental set up

Top PDF experimental set up:

Experimental set up for characterization of acousto-optic modulator system

Experimental set up for characterization of acousto-optic modulator system

A preliminaries experiment is carried out using a fibre coupled AOM using chalcogenide glass with refractive index 2.6. This study focus on investigating the characteristic of AOM, studying the theory and working principle of AOM and other equipment in experimental set up, to get the relationship between driving voltage from RF driver and output power from modulator causes by the changes in output level from radio frequency (RF) driver, to observe several light source sensitivity.

25 Read more

Development Of Experimental Set Up Of Improved Bamboo Processing Machine

Development Of Experimental Set Up Of Improved Bamboo Processing Machine

Traditionally the bamboo is processed in different steps and for each step a different machine is required, the main aim behind this development of experimental set up of improved bamboo processing machine is to reduce the number of steps and also to reduce the number of machines required to do the desired work. So an improved bamboo processing machine is fabricated which can perform splitting and slicing on a single machine. The design involves a new concept of making a special purpose of die for splitting and slicing, the concept behind this project is that, the machine is kept common for both the operations; only the die for splitting and slicing is different. This will eliminate the use of special machine for slicing which is to be done after splitting the bamboo. In this research, an approximate generalized experimental data based model for bamboo processing operation such as splitting and slicing, by varying some dependent parameters during experimentation is made.
Show more

5 Read more

Progress on the experimental set-up for the testing of a floating offshore wind turbine scaled model in a field site

Progress on the experimental set-up for the testing of a floating offshore wind turbine scaled model in a field site

Abstract – This document describes the design and the realization of a small scale field experiment on a 1:30 model of a spar floating support structure for offshore wind turbines. The aim of the experiment is to investigate the dynamic behaviour of the floating wind turbine under extreme wave and parked rotor conditions. The experiment has been going on in the Natural Ocean Engineering Laboratory (NOEL) of Reggio Calabria (Italy). In this paper all the stages of the experimental activity are presented and some results are shown in terms of motions and RAOs. Finally, a comparison with the corresponding results obtained using the ANSYS AQWA software package is shown and conclusions are drawn. The herein presented experimental set up seems promising to test offshore floating structures for marine renewable energy at a relatively large scale in the NOEL field site.
Show more

18 Read more

EXPERIMENTAL SET UP ON METAL SPINNING

EXPERIMENTAL SET UP ON METAL SPINNING

Mandrel is a supporting as well as rotating part in the metal spinning set up. As we are trying to produce a component having a shape cone so we design cone shaped mandrel. Blank is clamped between the mandrel and tailstock and this blank is deforming over the mandrel by applying the force with the help of roller. When we take a trial fork of the roller tackle with tailstock so we have to remove tailstock for that we make the threaded drill on the front face of mandrel to remove the tailstock. Cracks also appear on the component due to corner edge of the mandrel this problem is also removed by giving a corner radius to the mandrel. Both old and modified mandrel are shown in Fig 6(a) and 6(b)
Show more

7 Read more

A Simple Strategy for Life Signs Detection via an X-Band Experimental Set-Up

A Simple Strategy for Life Signs Detection via an X-Band Experimental Set-Up

Abstract—In this paper, a simple and effective method for Through- The-Wall (TTW) life signs detection is introduced and discussed. To this aim, a Continuous Wave (CW) Microwave Transceiver working in X-Band is adopted. The detection procedure is based on the evaluation of correlation function in frequency domain between the measured and model signals. In order to ensure the reliability, proper background removal strategies are introduced. The effectiveness of the proposed approach is shown by processing experimental data collected in a realistic TTW scenario.

11 Read more

MODAL ANALYSIS – Experimental Set-up to determine the floor dynamics at IIT Kharagpur

MODAL ANALYSIS – Experimental Set-up to determine the floor dynamics at IIT Kharagpur

The excitation for the experimental work was provided by an APS Dynamics model 113 ES electrodynamic shaker (Spectral dynamics). It delivers a max force of 62 N, max Velocity 760 mm/s, max stroke 158mm and weight 38 kgs. Henceforth it will be termed as long stroke shaker/ shaker. This shaker system along with the data acquisition system was purchased during the course of this work and therefore the undersigned was responsible for commissioning of the same. For the same reason, a little elaboration will be made on the use of this system.

6 Read more

Cellular fluid shear stress on implant surfaces—establishment of a novel experimental set up

Cellular fluid shear stress on implant surfaces—establishment of a novel experimental set up

systems. Open systems, which are hydrostatically driven, are characterised by a fluid flow that passes the stationary phase once only [36]. In sealed models, the culture medium recir- culates pump driven through the system [22]. Due to their inherent system-related drawbacks such as turbulent flow generation on boundary surfaces, those flow chambers are inappropriate for laminar flow creation. However, open sys- tems have benefits of allowing the use of different culture media in a row without ceasing the fluid shear stress. There- fore, one can easily enable or disable different stimuli by ex- changing the culture medium to evaluate its cellular impact. Sealed systems such as reported in this study do not provide this option. Initially added substances within the culture medium cannot be eliminated during the experimental process. Instead, stopping the flow and draining the cells would be necessary which would cause another unwanted influence to the test cells.
Show more

10 Read more

Modal Analysis of Silicon Carbide   Banana Fiber Epoxy Composites using an Experimental Set Up

Modal Analysis of Silicon Carbide Banana Fiber Epoxy Composites using an Experimental Set Up

To further improve the properties, reinforcements such as metals or alloys in the form of either whiskers or in the form of particles are introduced into the composites thereby improving their properties and reducing their short comings. This new type of composites combines the properties of both the natural and metallic reinforcements with a unique set of properties that differ from the composites made out of the natural fibers. Also, the resultant composites possess properties that are not found in the individual reinforcements originally.

5 Read more

Experimental Set-up of the 532nm Green Laser for the Measurement of the AC Stark Shift in a Cesium Fountain Clock

Experimental Set-up of the 532nm Green Laser for the Measurement of the AC Stark Shift in a Cesium Fountain Clock

My contribution consists in the construction of the optical set-up of a 5W commercial solid-state laser at 532 nm. This green laser is conducted along the vertical axis of the fountain (cavity hole of a 1,1cm diameter) via optics mounted on an optical table separated from the rest of the cesium fountain’s optical set-up.

7 Read more

Neutron capture and fission reactions on 235U: cross sections, α-ratios and prompt γ-ray emission from fission

Neutron capture and fission reactions on 235U: cross sections, α-ratios and prompt γ-ray emission from fission

contribution are separated thank to the fission tagging capabilities of the experimental set-up. The good resolution of the n_TOF facility has allowed observing resonances all the way up to the beginning of the unresolved resonance region (URR) at 2.25 keV. Furthermore, there are also data available beyond this energy limit and up to 10 keV; however, this energy interval is largely dominated by background and it is not known yet the accuracy that will be reachable.

5 Read more

The Inherent Walking Direction Differs for the Prothoracic and Metathoracic Legs of Stick Insects

The Inherent Walking Direction Differs for the Prothoracic and Metathoracic Legs of Stick Insects

Experimental set-up for recording in the walking insect the force generated by the flexor tibiae muscle and the activity of the extensor motor neurones in response to stimulation of the [r]

12 Read more

High Gain DC-DC Converter using Active Clamp Circuit (RESEARCH NOTE)

High Gain DC-DC Converter using Active Clamp Circuit (RESEARCH NOTE)

The experimental set up of the proposed converter with the specifications mentioned in Table 1 was built and tested for verifying its performance. Figure 10 shows the gate pulses applied to the main and auxiliary switches. The converter duty cycle, complementary nature of the gate pulses and the voltage across the switches can be verified from Figure 10. The application and removal of gate pulse to the main switch causes energy storage and dissipation across the inductor, respectively. This behaviour of the proposed converter is verified from Figure 11. The proposed converter provided the required voltage gain of 10. As a result, the output voltage was 123 V which closely matches with the theoretical design and simulation results. Further, based on the output current waveform, it can be verified that the output power obtained at the output was 320W which explains the operating range of the proposed converter. Figure 12 confirms the wide operating range of the proposed converter along with its ability to provide the required output voltage and output current. The voltage stress across the main and auxiliary switches is within acceptable limits and is shown in Figures 13 and 14, respectively.
Show more

8 Read more

Development Of Computer Controlled Test Measurement System For Gas Sensing Applications

Development Of Computer Controlled Test Measurement System For Gas Sensing Applications

First part assigns with the electro spinning technique availed for the deposition of conducting polymer thin films on the substrate followed by the structural characterization techniques used to study the nanostructure and morphology of the deposited films, i.e., Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD). Second part assigns with the electrical characterization carrying experimental set-up and methodology used for the gas sensing and further with the evaluation of diverse sensing properties of gas sensor like sensitivity, selectivity, response time, recovery time, reproducibility and long term stability. Third part deals with the hardware and the software used to interface sensors with Data acquisition (DAQ) system and Mass Flow controller (MFC).
Show more

6 Read more

Thermal Efficiency of a Concentrating Solar Collector Under High-Vacuum

Thermal Efficiency of a Concentrating Solar Collector Under High-Vacuum

On the glass and vessel external surface natural convection is imposed as a boundary condition. Sunlight incoming power is modelled as heat flux boundary condition: every CPC component receives the power fraction calculated by the ray optics analysis in visible range. Heat exchange with the heat transfer fluid is modelled with a heat flux boundary condition too. The efficiency curve is obtained changing the power subtracted from the circulating fluid in the pipe from 0 W up to available power. The same approach was used also for the flat panel: in this case we have an experimental set-up to verify our simulations and we performed the simulation using in the actual experimental conditions.
Show more

7 Read more

An Analysis of Conjugate Heat Transfer in the Heat Sink of an Electronic Chip

An Analysis of Conjugate Heat Transfer in the Heat Sink of an Electronic Chip

This paper describes the construction of an algorithm for conjugate heat-transfer calculations in order to find the most suitable form for the heat sink of an electronic chip. Applying volume averaging theory (VAT) to a system of transport equations, a heat-sink structure was modeled as a homogeneous porous medium. The geometry of the simulation domain and the boundary conditions followed the experimental set- up used in the Morrin-Martinelli-Gier Memorial Heat Transfer Laboratory at the University of California, Los Angeles. The example numerical simulations were performed for the test section with an isothermal structure as well as for the heat-conducting aluminum pin-fins. A comparison of the whole-section drag coefficient C d as a function of Reynolds number Re h reveals good agreement with existing data, whereas the
Show more

9 Read more

Failure Characteristics of Cladding Tubes under RIA Conditions Through  Electromagnetic Forming

Failure Characteristics of Cladding Tubes under RIA Conditions Through Electromagnetic Forming

In the frame of actions for improving the safety of its nuclear power plants, Électricité de France needs to build the mechanical criteria ensuring the clad integrity for several operating conditions. As concerns the rod ejection accidents, an analytical mechanical criterion has recently been developed in order to assess the risk of failure during an RIA event. The derivation of this analytical criterion requires the use of an experimental data base, which is not always perfectly representative of the RIA full-scale test loading conditions. The aim of this study is to develop an experimental set up in order to characterize the fracture behavior of cladding tubes under RIA conditions (equibiaxial tension and high strain rates). The developed experimental set up is based on electromagnetic forming. The development of the test is delicate but leads to repeatable results with a controlled strain biaxiality ratio and very high strain rates. The experimental results are in good agreement with the first simulations of the test.
Show more

8 Read more

Synthesis of Nanoparticles through Flame Spray Pyrolysis: Experimental Apparatus and Preliminary Results

Synthesis of Nanoparticles through Flame Spray Pyrolysis: Experimental Apparatus and Preliminary Results

strictly depend on precursor concentration and dispersion gas flow rate [8, 9]. Moreover, also inorganic nanorods can be synthesized through this technique [10]. A typical experimental set-up [11, 12] is constituted by a unit for droplets generation and dispersion (usually a gas-assisted spray), a heat source for droplets evaporation and ignition and an oxidant for combustion. The simplest way to generate micron size droplets is the use of an assisted atomizer, which presents also optimal features under the point of view of homogeneity of droplets size. Obviously, due to the complexity of the physical and chemical phenomena involved in the controlled synthesis by FSP, investigation should be performed about the influence of the operating conditions of the spray (flow field, dimensional distribution, precursor typology and physical properties, gas to liquid mass ratio, oxidant typology) on the final product, that is on the morphological and structural properties of the derived nanoparticles.
Show more

5 Read more

Performance Analysis of a 4 Stroke Twin Cylinder C I Engine using Pine Oil Methyl Esters with Isopropyl Alcohol

Performance Analysis of a 4 Stroke Twin Cylinder C I Engine using Pine Oil Methyl Esters with Isopropyl Alcohol

Experimental set up consists of a water cooled twin cylinder vertical diesel engine coupled to a rope pulley brake arrangement it shown in below, to absorb the power produced necessary weights and spring balances are induced to apply load on the brake drum suitable cooling water arrangement for the brake drum is provided. A fuel measuring system consists of a fuel tank mounted on a stand, burette and a three way cock. Air consumption is measured by using a mild steel tank which is fitted with an orifice and a U- tube water manometer that measures the pressures inside the tank. For measuring the emissions the gas analyser is connected to the exhaust flow.
Show more

7 Read more

The Effect of Hen Breeds on the Egg Response to the Non Destructive Impact

The Effect of Hen Breeds on the Egg Response to the Non Destructive Impact

The experimental set up developed by Nedomová et al. (2009a) was used. This experimental arrangement enables the recording of time history of the force at the contact area between the falling rod and eggshell and eggshell surface displacement. The objectives of the research were to: 1) analyse the response time signals and frequency signals of eggs, 2) find the effect of hen bread on dynamic resonance frequency, and 3) establish relationship between the dominant frequency and the eggshell strength under quasi-static compression.

8 Read more

Experimental evaluation and set-up of a new apparatus designed for transitional flow experiments

Experimental evaluation and set-up of a new apparatus designed for transitional flow experiments

One of the main obstacles facing the measuring process is the wall proximity measurement. It is well-known that detailed information on the flow in the vicinity of the wall is of particular interest for viscous types of flow and heat transfer predictions [20]. The wall proximity corrections in some experiments are applied on the hot wire reading [21]. To be able to use the wall law to get information on the flow in the viscous sublayer this requires moving by hot wire very near to the wall and thereby the linear viscous relation could be implemented. In some experimental investigations they use microscope device to determine the last measuring point in the velocity profile while the lack of such device in the present work hampers efforts to accurately measure the distance between end of the profile and the wall. The near point to the wall was measured above 0.5 mm. The task of stability and transition experimentation is not an easy task. When designing new experiment equipment, many parameters characteristics must be taken into consideration. Some of these characteristics such as mesh sizes and locations, numbers of samples and background of pressure distribution in spanwise direction. Conducting such kind of these experiments reveals that the measurements characteristics require a special sensitivity to environmental conditions. When small change in an experimental set-up and measuring is done, this may introduce unanticipated disturbances which can complicate the flow details or skew the interpretation of the results.
Show more

13 Read more

Show all 10000 documents...