| 摘要: |
| 在纯净空气来流下，对以液态航空煤油为燃料，以支板凹腔耦合方式稳焰的超燃燃烧室的燃油动态调节进行了研究，采用两台柱塞泵供油，结果表明:总燃油当量比为0.83的条件下，动态切换支板喷射位置从上游到下游的过程中，燃烧室上游的壁面压力先下降后上升，而靠近出口的壁面压力则先上升后下降，并最终稳定；动态调节支板喷射的当量比，壁面压力峰值随当量比升高而升高，但壁面压力提升的起始位置随当量比升高向上游移动；通过试验验证动态调节后的稳定时间足够，试验数据可靠。 |
| 关键词: 支板 凹腔 纯净空气 超燃 动态调节 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Fuel Dynamic Regulation Characteristics of a Strut-Cavity Based Scramjet Combustor |
|
WANG Jian-chen1,LIN Yu-zhen1,GUO Xin-hua2,ZHANG Chi1,LIU Wei1
|
|
(1. National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics，
School of Energy and Power Engineering，Beihang University，Beijing 100191，China;2. Science and Technology on Scramjet Laboratory，Beijing Power Machinery Institute，Beijing 100074，China)
|
| Abstract: |
| Experiments were performed to study the fuel dynamic regulation characteristics of a strut-cavity based scramjet combustor in clean air. The fuel was liquid kerosene and injected by two plunger pumps. The results show that，when the total fuel equivalence ratio was fixed at 0.83，if the location of injection from strut was changed from upstream to downstream dynamically，the upstream wall static pressure dropped then increased，but the downstream wall static pressure around the exit of the combustor increased then dropped，and at last they were stable. If the equivalence ratio of injection from strut was changed dynamically，the peak wall static pressure increased with the equivalence ratio，but the original location of the pressure rise would be moved upstream. Through experimental verification，the stability time after dynamic regulation was long enough，and the results were reliable. |
| Key words: Strut Cavity Clean air Supersonic combustion Dynamic regulation |
