[PDF] Top 20 Base Pressure Control by Supersonic Micro Jets in a Suddenly Expanded Nozzle

... controlling base pressure and their outputs were showcased in current ...paper. Micro jet active control techniques are used for controlling base ...around base and symmetric to ... See full document

... rolling pressure and forces, and thickness of the strip at exit of each ...a control in the form of annular ribs could serve as an effective controller to control the base pressure for ... See full document

... The jets aided in improving the base suction to zero levels without any effect on flow distribution ...the control efficacy results in a decrement of the pressure at the base region for ... See full document

... to control the base pressure in Backward facing step (BFS) for various Nozzle pressure ratio (NPR) having Compressible flow to minimize the base ...the base region was ... See full document

... wall pressure distribution in the enlarged duct, for L/D 10 to 1 for correct expansion at Mach number M = ...wall pressure with the reference ...wall pressure values for with and without ... See full document

... the control to reduce base pressure in sudden expansion flows with the axi-symmetric ...to control the base ...10. Nozzle pressure ratio (NPR) of the operating nozzles ... See full document

... typically supersonic, or it can be a part of separated wake, in which case it is typically ...heating, pressure, and shear at the ...thruster nozzle punches through the separated zone and into more ... See full document

... The control of base pressure on nozzle base is a very important field of study and finds application in many ...rocket nozzle base pressure field, flow field at the ... See full document

... the base pressure, for Mach numbers ...the control is ineffective and the minimum duct length required for the attached flow of L/D for the flow to be is L/D = 6, whereas the requirement for NPR 7, 9 ... See full document

... the nozzle, in the divergent part of the nozzle, and in the enlarged ...CD nozzle. The figures 4 to 8 illustrate the total pressure variation from the inlet to the outlet of the nozzle ... See full document

... the supersonic flow. Convergent- divergent (C-D) nozzle have been used with sudden ...The base pressure controlled by using the microjets of 1 mm of orifice diameter is arranged at ninety ... See full document

... speed jets that jets for correctly expanded cases for the Mach numbers in the range of low subsonic, sonic, and supersonic Mach numbers will be free from the waves, since they are correctly ... See full document

... two supersonic streams in a short mixing chamber is a major ...mixing. Nozzle geometry, different nozzle configurations a concept of passive method, considered in this paper to enhance the ... See full document

... sound pressure spectra in case of normal ...sound pressure level at about 800 Hz and ...and nozzle exit ...with nozzle pressure ... See full document

... Since the rate of application under low-pressure spray sprinklers can be minimized with the help of offset booms, sprinkler selection should ideally be based on drop size distribution. The drawback with small drop ... See full document

... 6 5 Conclusions 7 This article has presented the results of a large-scale experimental study of under-expanded 8 jets and dispersion characteristics of gaseous and dense phase CO2 follow[r] ... See full document

... Flow Control, Measurement & Visualization The downward arrow on the Pitot pressure distribution for the conventional nozzle in Figure 13(c) and Figure 13(d) indicates the Mach disk location ob- ... See full document

... a supersonic nozzle by the introduction of an original analytical expression for the pressure drop on the axis of the ...the pressure distribution it is easily possible, by selecting a ... See full document

... in jets and ...local supersonic flow relative to the phase speed of the instability ...and supersonic modes to designate the acoustic modes with subsonic and supersonic relative Mach numbers ... See full document

... Circular jets impinging vertically on flat surfaces have many practical applications such as in heating, cooling, metal cutting, fabric weaving and ...impinging jets have been performed for short stand-off ... See full document