摘要
根据相似原理。通过实验回归分析法,得出压力损失系数ζ与齿腔几何特性和流动特性的关系式。然后应用能量定律、连续方程、状态方程和Bernoulli方程与其联立,求解后可获得迷宫密封的全部特性。并可归纳成流量系数α、穿越系数β和迷宫函数ψ对全压比λ的特性曲线。应用这类曲线,可方便地计算出迷宫密封的泄漏率。
This paper presents the leakage characteristics of labyrinth seals, which were introduced by theoretical analysis and experiment result.The study of the dissipative process converting the kinetic energy to the thermal energy within the labyrinth chambers is emphasized.Experiments were carried out using a model of a straight-through labyrinth. By changing the Reynold's number, pressure ratio, and the ratios of clearance and depth to the length of the chambers, the flow coefficient, carry-factor and ideal labyrinth function can be obtained.Additionally, by applying the continuity equation, energy equation, Bernouli's equation and the equation of state to the vortex chambers, a closed set of equations are obtained. Solving the equations simultanoasly and numerically, the velocity, pressure and temperature in each vortex-chamber can be determined completly. Finally, the leakage of the labyrinth seal are acquired.
出处
《航空学报》
EI
CAS
CSCD
北大核心
1989年第2期B015-B019,共5页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金
