| 摘要: |
| 以汽油为燃料、空气为氧化剂,在长度一定的脉冲爆震发动机上,通过改变燃料填充长度进行了部分填充试验,试验涵盖了较宽的填充系数(燃料填充长度与爆震管长度之比)范围。采用对爆震管封闭端燃气压力积分的方法计算发动机冲量。结果发现,以燃料质量为基础的比冲随着填充系数的增大而减小;相反,以混合物质量为基础的比冲随着填充系数的增大而增大。研究还发展了部分填充模型用来推算爆震管部分填充状态的冲量。 |
| 关键词: 脉冲爆震发动机 部分填充+ 冲量 填充系数+ |
| DOI： |
| 分类号:V231.22 |
| 基金项目:国家自然科学基金(50336030);教育部“新世纪优秀人才计划”(NCET-04-0960);西北工业大学“英才培养计划”(05XE0125)资助 |
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| Effects of partial filling on the impulse of pulse detonation engine |
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ZHANG Qun, YAN Chuan-jun, FAN Wei, LI Qiang, LI Jiang-hong, YANG Bing-yu
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School of Power and Energy,Northwestern Polytechnic Univ.,Xi’an 710072,China
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| Abstract: |
| Partial-tube fill experiments were conducted in a fixed length PDE tube with a fuel section of different length,covering a wide range of the detonation tube fill fraction(ratio of fuel length to tube length),using gasoline as fuel and air as oxidizer.Impulse was calculated by integrating the pressure at the closed end of the tube.Based on the results obtained experimentally,It is found that the fuel-based specific impulse declines with fill fraction.On the other hand,the total-mixture-based specific impulse rises as fill fraction increases.A partial-fill model is developed to predict the impulse obtained from a partially-filled detonation tube. |
| Key words: Pulse detonation engine Partial filling~+ Impulse Fill fraction~+ |
