below that at which a normal shock wave forms at the exit from the nozzle, that normal shock wave deforms outward into oblique shock waves emanating from the edge of the exit from the nozzle as shown in Figure 7. These oblique shock waves provide the mechanism by which the pressure increases to that downstream of this adjustment process.
An important configuration is that of oblique nozzles for nozzle combinations in pressure vessels. As the angle between the nozzle and the shell changes, the maximum stress magnitudes also change. For this reason, the literature reports some significant studies on this subject as well.
Oblique Shock Waves - NASA
2021年5月13日 · When a shock wave is inclined to the flow direction it is called an oblique shock. On this slide we have listed the equations which describe the change in flow variables for flow across an oblique shock.
Conical nozzles operate better at low Pe/Pa ratios for which the separation is expected. Nozzle exit divergence angle determines the stability of the separation zone. As the angle increases, the stability of the separation zone improves.
Under/Overexpanded Nozzles -5 AE3450 School of Aerospace Engineering Copyright © 2001-2002 by Jerry M. Seitzman. All rights reserved. Underexpanded Jet p•Fro e>pb, nozzle produces a jet flow consisting of regions of decreasing and increasing p (or density) – inviscid flow (ideal), process would continue endlessly
What are the conditions for shocks forming in converging-diverging nozzles?
2023年9月20日 · Generally, to have shockwaves inside the nozzle (very undesirable for rocket nozzle applications), you need to reach a condition called over expansion. The exit pressure of the nozzle is lower than the external ambient one. The reverse pressure gradient causes the flow to detach from the walls of the nozzle and an oblique shockwave is produced.
Lecture # 12: Shock Waves and De Laval Nozzle
de Laval nozzle (or convergent-divergent nozzle, CD nozzle) is a tube that is pinched in the middle, making an hourglass-shape. It is used as a means of accelerating the flow of a gas …
International Journal of Pressure Vessels and Piping - ScienceDirect
2018年5月1日 · The present research revisits rare experiments which determined elastic shakedown (SD) limit pressures of full scale radial and oblique nozzles partially penetrating spherical vessels. The experiments were conducted at …
Normal Shocks in CD Nozzles -4 School of Aerospace Engineering Copyright © 2001 by Jerry M. Seitzman. All rights reserved. Example • Given: CD nozzle designed to produce Me=3 for isentropic flow • Find: What range of back pressure, pb will produce shock in nozzle (throat →exit)? • Assume: TPG/CPG with γ=1.4 po pe pb To Ae At pes,sup p ...
Mathematical Modeling of Operating Process and Technological Features ...
2019年6月7日 · The article discusses the design features of vortex type liquid-vapor jet devices in the form of an oblique cut-off nozzle of the motive flow while entering the vortex chamber. Mathematical modeling allows proving the influence of the oblique cut to a deflection of the flow from the nozzle axis by a certain angle.