環(huán)量控制技術(shù)研究
[Abstract]:In recent years, the high performance requirement of military / civilian transport aircraft is becoming a new research hotspot. In this paper, the research progress of loop control is briefly introduced. In this paper, the experimental research of NASA which can be used for CFD verification is discussed in detail, including 2-D loop control airfoil scalar model and CCA/OTW (Circulation Control Airfoil/Over the Wing) experiment, semi-model subsystem experiment and three-dimension pterygoid fusion whole aircraft experiment. The experimental results of the same two-dimensional model in two similar wind tunnels show that the maximum lift coefficient (CLmax) derived from tangential blowing can reach 8 / 9 at the outlet height of the middle seams. Data comparison shows that the experimental results can be used for (CFD) verification of computational fluid dynamics. Two-dimensional CCA/OTW experiments show that the forward displacement of engine position can greatly increase the intensity of the low-frequency part of the stall angle of attack and the CLmax;CCA rear edge blowing noise, and the intensity of the low-frequency part is proportional to the eighth power of the velocity, and the high-frequency part is directly proportional to the sixth power of the velocity. The FACT-MAC transonic experiments of the semi-model subsystem can not only study the high Reynolds number effect, but also provide the data of two flight states. The preliminary results show that compared with the low speed data without jet, the CL increases about 33% at 偽 = 25 擄, and the jet can effectively reattach shock induced separation at transonic velocity in a non-designed state. The shock wave position can be pushed back by 5% chord length under the original strength. The experimental data of 3D CCW/OTW are still in the process of analysis, but the preliminary results show that the stall angle of attack can be increased to 25 擄, the CLmax can be increased to 6, and the slope of lift line can be increased by correctly arranging the position of OTW.
【作者單位】: 北京航空航天大學(xué)航空科學(xué)與工程學(xué)院;
【分類號(hào)】:V211.41
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