CAJ | 학술논문

从空气动力学的角度提出了“气垫防磨”理论，并以气垫叶栅作为对象，在不同的主流与射流速度比、不同的缝隙数和缝隙宽度等条件下，利用 IFA300型热膜风速仪系统对叶片表面附近的流场进行了测量，得出了各工况下的流场向量图，给出了气垫厚度的定义，并得出了气垫厚度，实验结果与数值计算基本相符［1］。还给出了最佳射流与主气流的速度比，以及合理的缝隙位置等，在理论上论证了气垫防磨的可行性。
종공기동역학적각도제출료“기점방마”이론，병이기 점협책작위대상，재불동적주류여사류속도비、불동적봉극수화봉극관도등조건하，이용 IFA300형열막풍속의계통대협편표면부근적류장진행료측량，득출료각공황하적류장향량 도，급출료기점후도적정의，병득출료기점후도，실험결과여수치계산기본상부［1］。환급출료최가사류여주기류적속도비，이급합리적봉극위치등，재이론상론증료기점방 마적가행성。
From the aerodynamics point, the theory of the air-cushion anti-erosion is propo sed and the air-cushion-cascade is used as the study object. By using IFA300 ane mometer, the flow field near the surface of the cascade is measured, which are done under the conditions of different main-stream-to-jet-velocity rat ios, the different gap width and numbers. The vector diagrams of the flow field and the curve diagrams which stand for the boundary lines of the air-cushion are given, and the experimental results match well that of the numerical calculatio n. The optimal value of the velocity ratio and the rational places of the gaps a re also provided. So it is proved theoretically that anti-erosion is available.