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98彩票网- and the mean tangential velocity is prescribed. The b

作者:98彩票网 来源:98彩票网 关注: 时间:2018-06-13 23:38

the blades of negligible thickness, and the mean tangential velocity is prescribed. The blades are represented by a distributed bound vorticity whose strength is determined by the prescribed tangential velocity. The velocity induced by the bound vortices is obtained by a conventional Biot-Savart method assuming a first approximation to the blade profile. Using the blade surface boundary condition, the velocity is divided into a pitchwise mean value and a value varying periodically in the pitchwise direction. By using generalized functions to represent the bound vorticity and a Clebsch formulation for the periodic velocity, the profile is then obtained by iteration. It is shown that this procedure is successful even for large pitch-chord ratios and large deflections. In order to develop a method for use in three dimensions, three-dimensional blade profiles for axial compressors and turbines,98彩票网, series expressions are obtained which can be adapted to three-dimensional problems. Several numerical results were obtained using both approaches. ,98彩票网手机登录, As a step in the development of an analytical method for designing highly loaded, a simple two-dimensional method was first investigated. The fluid is assumed to be incompressible and inviscid。

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