小腔对排气活门快速调压能力的影响

吴豪; 刘猛; 王浚

doi:10.13700/j.bh.1001-5965.2023.0248

小腔对排气活门快速调压能力的影响

doi: 10.13700/j.bh.1001-5965.2023.0248

北京航空航天大学航空科学与工程学院，北京 100191

详细信息

通讯作者:
E-mail：liumeng@buaa.edu.cn

中图分类号: V245.4
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出版历程
- 收稿日期: 2023-05-15
- 录用日期: 2023-08-14
- 网络出版日期: 2023-08-22
- 整期出版日期: 2025-04-30

Effect of balance chamber on rapid pressure regulation ability of outflow valve

School of Aeronautic Science and Engineering，Beihang University，Beijing 100191，China

More Information

Corresponding author: E-mail：liumeng@buaa.edu.cn

摘要

摘要:
飞机座舱进气流量冲击情况下，气动式座舱压力调节系统(PCPCS)可能由于动态调节速度不足而导致座舱压力尖峰，进而出现“压耳”问题。基于此，对PCPCS的工作原理开展分析，指出小腔可能对排气活门的快速运动产生阻碍。建立PCPCS的动力学模型，描述排气活门中控制腔（A腔）和小腔（B腔）的工作状态；开展PCPCS在座舱进气流量冲击下的动态工作仿真，定量展示排气活门的动态工作特征和活门芯的受力变化；讨论小腔定径孔直径、小腔顶部直径、小膜片直径对排气活门应对座舱进气流量冲击的影响。仿真结果表明：适当增大小腔定径孔直径有助于提升排气活门响应速度，小腔顶部直径对排气活门运动速度没有显著影响，减小小膜片直径对排气活门响应速度的提升较为显著。
- 飞行器环境控制 /
- 飞机座舱压力调节 /
- 压耳 /
- 气动式座舱压力调节系统 /
- 排气活门
Abstract:
Under aircraft cabin inflow impact, the inadequate dynamic regulation speed of the pneumatic cabin pressure control system (PCPCS) may lead to a cabin pressure spike, causing “barotrauma”. Therefore, the working principle of the PCPCS was analyzed, and it was pointed out that the balance chamber may hinder the rapid movement of the outflow valve. A dynamic model of the PCPCS was established. The working states of the control chamber (A chamber) and the balance chamber (B chamber) in the outflow valve were described. The dynamic simulation of the PCPCS under cabin inflow impact was carried out. The dynamic working characteristics of the outflow valve and the force changes of the poppet were quantitatively displayed. The effects of the metering hole diameter of the balance chamber, the top diameter of the balance chamber, and the diameter of the balance diaphragm on the outflow valve’s response to cabin inflow impact were discussed. The simulation results show that appropriately increasing the metering hole size of the balance chamber can help to improve the response speed of the valve; the top diameter of the balance chamber has no significant effect on the movement speed of the outflow valve, and reducing the area of the balance diaphragm improves the response speed of the outflow valve significantly.
- environmental control of aircraft /
- pressure control of aircraft cabin /
- barotrauma /
- pneumatic cabin pressure control system /
- outflow valve

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图 1 飞机气动式座舱压力调节系统

Figure 1. PCPCS of aircraft

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图 2 排气活门

Figure 2. Outflow valve

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图 3 排气活门拆解图

Figure 3. Disassembly of outflow valve

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图 4 活门芯底部部分装配零件

Figure 4. Part of assembly parts at bottom of poppet

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图 5 小腔充气示意图

Figure 5. Balance chamber inflation

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图 6 指定座舱进气流量时的计算流程

Figure 6. Calculation process when specifying cabin inflow

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图 7 座舱进气流量冲击

Figure 7. Cabin inflow impact

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图 8 座舱进气流量冲击下的座舱压力变化率

Figure 8. Change rate of cabin pressure under cabin inflow impact

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图 9 座舱进气流量阶跃下的排气活门及座舱状态变化

Figure 9. State changes of outflow valve and cabin under cabin inflow step

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图 10 座舱进气流量阶跃过程中活门芯的受力变化

Figure 10. Force changes of poppet during cabin inflow step process

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图 11 不同B腔定径孔直径对应的排气活门动态特征

Figure 11. Dynamic characteristics of outflow valve corresponding to different metering hole diameters of balance chamber

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图 12 不同B腔顶部直径对应的稳态活门开度和稳定座舱压力

Figure 12. Steady state opening and cabin pressure corresponding to different top diameters of balance chamber

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图 13 不同B腔顶部直径对应的排气活门动态特征

Figure 13. Dynamic characteristics of outflow valve corresponding to different top diameters of balance chamber

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图 14 不同小膜片直径对应的稳态活门开度和稳定座舱压力

Figure 14. Steady state opening and cabin pressure corresponding to different diameters of balance diaphragm

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图 15 不同小膜片直径对应的排气活门动态特征

Figure 15. Dynamic characteristics of outflow valve corresponding to different diameters of balance diaphragm

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