Research of the continuous scan test method for inlet in low wind tunnel
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摘要: 在中国空气动力研究与发展中心FL–13风洞对进气道连续扫描低速风洞试验方法进行了初步研究。提出了进气道连续扫描试验方法和流程，给出了连续扫描试验数据处理方法，并在FL–13风洞开展了进气道常规试验方法与连续扫描试验方法的对比试验。两种方法试验结果一致性较好，所获得的进气道出口截面气动特性参数差值远小于国军标重复性精度要求。试验结果验证了进气道连续扫描试验方法的有效性和可行性。与进气道常规试验方法相比，连续扫描试验方法能够大幅度提高试验效率，同时还能够获得更多的有效试验数据。Abstract: The continuous scan test method for the inlet of airplane was studied in the FL–13 wind tunnel of CARDC. The test methods and procedures were proposed and the test data processing methods were also provided. Inlet tests were performed in the FL–13 wind tunnel to compare the conventional test method with the continuous scan test method. The test results with the continuous scan test method have a good consistency with the conventional test method, which verifies the availability and feasibility of the continuous scan test method for the inlet in the low speed wind tunnel. The research results show that the continuous scan test method can raise the tests efficiency and acquire more test data for the inlet test in the wind tunnel.
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Key words:
- inlet test /
- wind tunnel test /
- continuous scan /
- test method /
- FL–13 wind tunnel
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图 2 稳态周向畸变指数计算说明图
Figure 2. The schematic for calculating the circumference distort index
图 3 常规试验方法与连续扫描试验方法结果对比（α=−6°、0°，Ma=0.2，β=15°）
Figure 3. Comparison of the test results for conventional method and continuous scan method（α=−6°and 0°, Ma=0.2, β=15°）
图 4 常规试验方法与连续扫描试验方法结果对比（α=6°、12°，Ma=0.2，β=15°）
Figure 4. Comparison of the test results for conventional method and continuous scan method（α=6°and 12°, Ma=0.2, β=15°）
图 5 进发匹配点进气道性能参数随迎角变化曲线（Ma=0.2，β=15°）
Figure 5. The matching value of inlet performance varies with angle of attack（Ma=0.2, β=15°）
图 6 常规试验方法与连续扫描试验方法结果对比（α=−6°、0°，Ma=0.2，β=0°）
Figure 6. Comparison of the test results obtained by conventional method and continuous scan method（α=−6°and 0°, Ma=0.2, β=0°）
图 7 常规试验方法与连续扫描试验方法结果对比（α=6°、12°，Ma=0.2，β=0°）
Figure 7. Comparison of the test results obtained by conventional method and continuous scan method（α=6°and 12°, Ma=0.2, β=0°）
图 8 进发匹配点进气道性能参数随迎角变化曲线（Ma=0.2，β=0°）
Figure 8. The matching value of inlet performance varies with angle of attack（Ma=0.2, β=0°）
表 1 大车状态进发匹配点处连续扫描与常规方法试验结果差值（Ma=0.2，β=15°）
Table 1. The difference value of matching value under cart condition for conventional method and continuous scan method（Ma=0.2, β=15°）
α/（°） φm差值 σm差值 Δσθm差值 Tum差值 Wm差值 −6 0.0002 0.0002 0.0001 −0.0004 −0.0003 0 0.0003 0.0003 0.0003 0.0001 0.0004 6 0.0002 0.0002 0.0001 −0.0002 −0.0002 12 0.0001 0.0001 −0.0003 −0.0002 −0.0005 国军标重复性精度要求 0.01 0.005 0.005 0.005 — 
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表 2 慢车状态进发匹配点处连续扫描与常规方法试验结果差值（Ma=0.2，β=15°）
Table 2. The difference value of matching value under idling condition for conventional method and continuous scan method（Ma=0.2, β=15°）
α/（°） φm差值 σm差值 Δσθm差值 Tum差值 Wm差值 −6 −0.0001 −0.0002 0 0 0 0 −0.0001 −0.0002 0 0 0.0001 6 0 0 −0.0001 0 −0.0001 12 0 0 −0.0002 0 −0.0002 国军标重复性精度要求 0.01 0.005 0.005 0.005 —
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表 3 大车状态进发匹配点处连续扫描与常规方法试验结果差值（Ma=0.2，β=0°）
Table 3. The difference value of matching value under cart condition for conventional method and continuous scan method（Ma=0.2, β=0°）
ω/（°·s−1） α/（°） φm差值 σm差值 Δσθm差值 Tum差值 Wm差值 0.5 −6 −0.0001 −0.0001 0.0001 0.0001 0.0002 0.2 −6 0.0002 0.0002 0.0000 0.0003 0.0002 0.5 0 0.0001 0.0001 0.0001 −0.0002 −0.0001 0.2 0 −0.0001 0.0000 −0.0001 −0.0001 −0.0002 0.5 6 0.0001 0.0001 −0.0002 0.0000 −0.0002 0.2 6 0.0003 0.0004 −0.0002 0.0003 0.0001 0.5 12 0.0004 0.0005 −0.0003 −0.0001 −0.0005 0.2 12 0.0007 0.0008 −0.0004 −0.0002 −0.0005 国军标精度要求 0.01 0.005 0.005 0.005 —
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表 4 慢车状态进发匹配点处连续扫描与常规方法试验结果差值（Ma=0.2，β=0°）
Table 4. The difference value of matching value under idling condition for conventional method and continuous scan method（Ma=0.2, β=0°）
ω/（°·s−1） α/（°） φm差值 σm差值 Δσθm差值 Tum差值 Wm差值 0.5 −6 0.0001 0.0002 0 −0.0001 −0.0001 0.2 −6 0.0001 0.0002 −0.0004 −0.0002 −0.0005 0.5 0 −0.0002 −0.0006 −0.0012 0.0004 −0.0008 0.2 0 0 0 −0.0005 0.0002 −0.0004 0.5 6 0 0 −0.0001 0 −0.0001 0.2 6 0 0.0001 0 −0.0001 −0.0001 0.5 12 0 −0.0001 −0.0002 −0.0001 −0.0003 0.2 12 0.0000 0.0000 −0.0001 −0.0001 −0.0001 国军标精度要求 0.01 0.005 0.005 0.005 —
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