MODELING OF SHUTDOWN PROCESS IN LIQUID PROPELLANT ROCKET ENGINES

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SHAFIEY DEHAJ M.; EBRAHIMI R.; KARIMI H.; JALALI A.; NADERI M.

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Journal: Journal of Space Science and Technology Year:2014 | Volume:6 | Issue:4 (17) Page(s): 1-11

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Title

MODELING OF SHUTDOWN PROCESS IN LIQUID PROPELLANT ROCKET ENGINES

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Keywords

LIQUID PROPELLANT ROCKET ENGINEQ2

SHUTDOWNQ2

CUT-OFF IMPULSEQ2

MODELINGQ2

Abstract

The effects of LIQUID PROPELLANT ROCKET ENGINEs thrust termination transients are important in achieving the launch vehicle’s desired final velocity with the required precision. In this paper, a mathematical model has been developed to predict the changes in the combustion chamber pressure and the related CUT-OFF IMPULSE based on the physical aspects of engine’s components. The MODELING is divided into four steps: (1) from issuing the cut-off command to the activation of valve (2) from the time of executing the stop command until the end of the operation of the cut-off valves, (3) from the time that after the valve is shutt closed until the combustion chamber is extinguished and (4) simulation of the phase change and propellant components evaporation in corrugates. Results suggest that the duration of the first two steps have a significant effect on increasing or decreasing the amount of the thrust force and the 4th step’s thrust is less than 10 percent of nominal value while, the most thrust fluctuations appear in this step.

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APA: Copy

SHAFIEY DEHAJ, M., EBRAHIMI, R., KARIMI, H., JALALI, A., & NADERI, M.. (2014). MODELING OF SHUTDOWN PROCESS IN LIQUID PROPELLANT ROCKET ENGINES. JOURNAL OF SPACE SCIENCE AND TECHNOLOGY (JSST), 6(4 (17)), 1-11. SID. https://sid.ir/paper/150006/en

Vancouver: Copy

SHAFIEY DEHAJ M., EBRAHIMI R., KARIMI H., JALALI A., NADERI M.. MODELING OF SHUTDOWN PROCESS IN LIQUID PROPELLANT ROCKET ENGINES. JOURNAL OF SPACE SCIENCE AND TECHNOLOGY (JSST)[Internet]. 2014;6(4 (17)):1-11. Available from: https://sid.ir/paper/150006/en

IEEE: Copy

M. SHAFIEY DEHAJ, R. EBRAHIMI, H. KARIMI, A. JALALI, and M. NADERI, “MODELING OF SHUTDOWN PROCESS IN LIQUID PROPELLANT ROCKET ENGINES,” JOURNAL OF SPACE SCIENCE AND TECHNOLOGY (JSST), vol. 6, no. 4 (17), pp. 1–11, 2014, [Online]. Available: https://sid.ir/paper/150006/en

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