Peculiarities of high-temperature two-phase flow of combustion products in channels with an intentionally structured system of shock-waves

To protect a pressurized system from overpressure, one of the most established strategies is to install a Pressure Safety Valve (PSV). Therefore, the excess pressure of the system is relieved through a vent pipe when PSV opens. The vent pipe is also called “PSV Outlet Header”. After the process starts, a transient two-phase flow is formed inside the outlet header consisting of high speed pressurized gas interacting with existing static air. The high-speed jet compresses the static air towards the end tail of the pipe until it is discharged to the ambiance and eventually, the steady state is achieved. Here, this transient process is investigated both analytically and numerically using the method of characteristics. Riemann’s solvers and Godunov’s method are utilized to establish the solution. Propagation of shock waves and flow property alterations are clearly demonstrated throughout the simulations. The results show strong shock waves as well as high transient pressure take place inside the outlet header. This is particularly important since it indicates the significance of accounting for shock waves and transient pressure, in contrast to commonly accepted steady state calculations. More precisely, shock waves and transient pressure could lead to failure, if the pipe thickness is chosen only based on conventional steady state calculations.

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Experimental study on the behavior of the two phase flow shock waves occurring in the ejector refrigeration cycle

Mechanical Engineering Journal ◽

10.1299/mej.16-00255 ◽

2016 ◽

Vol 3 (6) ◽

pp. 16-00255-16-00255 ◽

Cited By ~ 1

Author(s):

Haruyuki NISHIJIMA ◽

Kyohei TSUCHII ◽

Masafumi NAKAGAWA

Keyword(s):

Experimental Study ◽

Shock Waves ◽

Two Phase Flow ◽

Refrigeration Cycle ◽

Phase Flow ◽

Two Phase

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Thermochemical breakdown of carbon-composite heat shielding materials in a high-temperature two-phase flow

Combustion Explosion and Shock Waves ◽

10.1007/bf00754872 ◽

1992 ◽

Vol 28 (6) ◽

pp. 619-627

Author(s):

V. A. Burakov ◽

S. F. Sandu

Keyword(s):

High Temperature ◽

Two Phase Flow ◽

Carbon Composite ◽

Phase Flow ◽

Two Phase ◽

Heat Shielding ◽

Composite Heat

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Heat Flux Measurement Method of Two-Phase Flow in SRM

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.152-154.883 ◽

2012 ◽

Vol 152-154 ◽

pp. 883-888

Author(s):

Xiang Yu Zhang ◽

Guo Qiang He ◽

Pei Jin Liu ◽

Jiang Li

Keyword(s):

Heat Transfer ◽

Heat Flux ◽

Two Phase Flow ◽

Thermal Protection ◽

Flux Measurement ◽

Combustion Products ◽

Phase Flow ◽

Solid Rocket Motor ◽

Two Phase ◽

Heat Flux Measurement

Accurate information on heat transfer data of combustion products in the solid rocket motor chamber is a crucial prerequisite for the engine thermal protection. A measurement technique was well developed to acquire steady-state heat flux data of two-phase flow and was used successfully in the hostile environment. Experimental heat flux measurement has been obtained with an innovative designed instrument by simulating the flow field of complex charging configuration. The total heat flux of combustion products in the chamber was brought away by the coolant and calculated by its enthalpy rise in this device. The data could be used to analyze the heat transfer phenomena in SRMs and provide boundary condition for establishing insulation erosion model.

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