Simulation of wheel type fuel grain in hybrid rocket motor

Azami, Muhammad Hanafi and Kafafy, Raed and Idres, Moumen (2013) Simulation of wheel type fuel grain in hybrid rocket motor. In: International Conference on Mechanical, Automotive and Aerospace Engineering (ICMAAE 2013), 2 - 4 July 2013, Kuala Lumpur, Malaysia. (Unpublished)

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Abstract

till today, with issues specifically related to combustion instability and lowered regression rate. Simulation is used as a tool to investigate the behavior of hybrid rocket grains under varied operating conditions. In this paper, we develop simulation algorithm and a code, which may also serve as a valuable teaching resource. The algorithm is based on a legacy interior ballistic model. The simulation code is used to simulate the combustion process of a wheel typed fuel grain in a hybrid rocket. We analyze the performance of the grain in terms of the transient behavior of rocket thrust, specific impulse and the regression rate. The performance of wheel-typed grain is compared with conventional multiple circular-port grains. MATLAB® environment was used to develop the simulation code, and visualize the temporal variation of performance characteristics and grain geometry during burning. A numerical simulation of hydroxyl-terminated polybutadiene (HTPB) solid fuel with liquid oxygen was used to analyze the performance of the hybrid rocket. Results show an increase of the regression rate and thrust-to-weight ratio on a wheel-typed grain design compared to multiple circular port grain design. The final area of each port also indicated that the fuel slivers are less in a wheel-typed grain. However, multiple circular ports displayed a much better performance in specific impulse. This also shown that the performance of a hybrid rocket has a strong dependence on the geometrical fuel grain design.

Item Type:	Conference or Workshop Item (Full Paper)
Additional Information:	5259/43907
Uncontrolled Keywords:	hybrid rocket, internal ballistics, regression rate, wheel -typed fuel grain
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Dr Moumen Idres
Date Deposited:	21 Jul 2015 14:44
Last Modified:	21 Jul 2015 14:44
URI:	http://irep.iium.edu.my/id/eprint/43907

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