Experimental investigation of effect of partial filling on the impulse of pulse detonation engine

作     者：ZHANG Qun YAN ChuanJun FAN Wei LI Qiang 

作者机构：College of Power and Energy Northwestern Polytechnical University Xi'an 710072 China 

出 版 物：《Chinese Science Bulletin》 (CHINESE SCIENCE BULLETIN)

年 卷 期：2007年第52卷第20期

页      面：2859-2865页

核心收录：

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

基　　金：Supported by the National Natural Science Foundation of China (Grant No. 50336030) China Postdoctoral Science Foundation (Grant No. 20060400302) Northwestern Polytechnical University Plans for the Training Excellence (Grant No. 05XE0125) New Century Excellent Talents in University (Grant No. NCET-04-0960) 

主　　题：脉冲爆震发动机 填充分数 冲量 性能 

摘      要：Using poor-detonable liquid C8H16/air mixture with low-energy system (total spark energy of 50 mJ) and a new one-step detonation initiation method developed in this study, partial-tube fill experiments have been conducted in a fixed length PDE tube with a fuel/air mixture section of different length, covering a wide range of the detonation tube fill fraction (ratio of fuel/air mixture length to tube length). Impulse was calculated by integrating the pressure differential at the closed end of the tube. Based on the re- sults obtained experimentally, it is found that the fuel-based specific impulse declines when fill fraction increases. On the other hand, the total-mixture-based specific impulse rises as fill fraction increases. A multi-cycle partial-fill model is developed to predict the impulse obtained from a partially-filled detona- tion tube, which is valuable for the optimization of PDE performance.