[PDF] Top 20 ACTIVE CONTROL OF BASE PRESSURE IN SUDDENLY EXPANDED FLOW FOR AREA RATIO 4.84

... 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 ... See full document

... the active control of base flows using the experimental ...procedure. Active control of base pressure helps in reducing the base drag in aerodynamic devices having ... See full document

... L/D 4, 3, 2, and ...the active control is considerable in regulating the base ...the control is very effective for NPRs 9 and 11 but, for NPRs 3, 5, and 7 the control efficiency ... See full document

... of base pressure at L/D=10 In Figure 3, the variation of base pressure with NPR varying from 1 to 10 at Mach numbers ...a flow having active control and no control ... See full document

... the control of base pressure with and without the control in the form of the microjets with axi-symmetric suddenly expanded duct in the supersonic regime ...the base ... 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 base pressure, the flow development in the enlarged duct, and the total pressure loss between the two ...This pressure loss in the stagnation pressure was calculated based on ... See full document

... to control the base pressure in suddenly expanded axi- symmetric ...in base pressure is 152 percent for Mach number ...the base suction to almost zero level for ... See full document

... microjets control on wall pressure spreading in sudden expansion two-dimensional planar ...the base were employed to control ...the area ratio of ...length-to-diameter ... See full document

... at ratio of areas as ...of base pressure in the presence and absence of control are then analyzed and it is evident from those outcomes that in high speed flows the inertia level of the nozzle ... 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 ... See full document

... The flow adapts separation at the wall inflection at low altitude, and full flowing at high ...the flow by the transition from sea level to high altitude mode, a series of CFD Simulations are carried out ... See full document

... Another serious concern with distributing trips using the gravity method is that special generators of traffic such as airports, amusement parks, shopping centers, or schools may not be well modeled. Many travel demand ... See full document

... local flow in the vicinity of the thruster exit. Properties of the local flow depend on the free-stream parameters, atmo- spheric composition, capsule size, shape and attitude and the location of the ... See full document

... Our engineering information system stores and processes information about the engineering data and the condition of devices and pipes needed for operation (position, diameter, length, material used, date of installation, ... See full document

... and base bleeding which are known as two different active flow control methods on drag reduction of Ahmed model was investigated experimentally and the experimental results confirm the ... See full document

... As mentioned earlier, forced induction system play a central role in engine downsizing development to provide the necessary boost pressure. Forced induction technologies are nothing new as far as the automotive ... See full document

... CFD simulations have been carried out to observe the heat transfer phenomena of flow boiling liquid nitrogen through tube-in-tube heat exchanger. Experimental data has been taken from the thesis [13]. Simulation ... See full document

... Dispersing polystyrene nanobeads on the sample surface is one standard method for separating the top and bottom samples in near field heat transfer experiments [27, 38]. The beads have low thermal conductivity and allow ... See full document

... the active flow area at the entrance ...whole active part of the entrance pipe and the active flow is ...sudden pressure rise in the entrance pipe. This pressure ... See full document