Experimental Investigation of Fuel Regression Rate in Hydroxyl-terminated-polybutadiene Gaseous-oxygen Hybrid Rocket Motors
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概要
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The regression rate enhancement of hydroxyl-terminated-polybutadiene (HTPB) gaseous oxygen (GOX) hybrid rocket motors was investigated experimentally in a ground testing system. The effects of the addition of nano-sized aluminum (Al) or alloyed aluminum-magnesium (Al-Mg) powder to the fuel composition, mass flux of oxygen, and the oxidizer-fuel ratio on the fuel regression rate are presented. The experiments show that multiple-start and shutdown can be realized using gaseous oxygen/RP-1 pre-mixed torch designed in the present study. The fuel surface remained hot enough during the shutdown interval to reestablish combustion if the time of motor shutdown is less than 2 s. The deduced spatially averaged instantaneous regression rate and spatially and time-averaged regression rate fit well in the trend with time. The former way to calculate the regression rate can more precisely describe the fuel combustion process. As the oxidizer-fuel ratio increased during the test, the hybrid rocket motors didn't work at the optimal oxidizer-fuel ratio, which can induce a loss of specific impulse. The addition of alloyed Al-Mg or nano-sized Al to the HTPB fuel can enhance the regression rate. The effect due to the latter is the most significant.
著者
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Zhang Wei
College Of Biological Science And Technology Beijing Forestry University
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HU Jianxin
College of Aerospace and Materials Engineering, National University of Defense Technology
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ZHANG Weihua
College of Aerospace and Materials Engineering, National University of Defense Technology
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SONG Zhibin
College of Aerospace and Materials Engineering, National University of Defense Technology
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XIA Zhixun
College of Aerospace and Materials Engineering, National University of Defense Technology
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WANG Dequan
College of Aerospace and Materials Engineering, National University of Defense Technology
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HUANG Liya
College of Aerospace and Materials Engineering, National University of Defense Technology
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ZHANG Wei
College of Aerospace and Materials Engineering, National University of Defense Technology
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