SAE AIR 1168/1-1990(R2004)
不可压缩及可压缩液体流动的热动力学

Thermodynamics of Incompressible and Compressible Fluid Flow

SAE AIR 1168/1-1990(R2004) 发布历史

The fluid flow treated in this section is isothermal, subsonic, and incompressible. The effects of heat addition, work on the fluid, variation in sonic velocity, and changes in elevation are neglected. An incompressible fluid is one in which a change in pressure causes no resulting change in fluid density. The assumption that liquids are incompressible introduces no appreciable error in calculations, but the assumption that a gas is incompressible introduces an error of a magnitude that is dependent on the fluid velocity and on the loss coefficient of the particular duct section or piece of equipment. Fig. 1A-1 shows the error in pressure drop resulting from assuming that air is incompressible.With reasonably small loss coefficients and the accuracy that is usually required in most calculations, compressible fluids may be treated as incompressible for velocities less than Mach 0.2. Athigher velocities and for large loss coefficients (Kt and 4fUD), compressible flow analysisshould be used.

SAE AIR 1168/1-1990(R2004)由美国机动车工程师协会 US-SAE 发布于 1990-03-01。

SAE AIR 1168/1-1990(R2004) 在中国标准分类中归属于: V38 液压、冷气系统及其附件。

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 SAE AIR 1168/1-1990(R2004) 前三页，或者稍后再访问。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

SAE AIR 1168/1-1990(R2004)

发布日期

1990年03月01日

实施日期

废止日期

无

中国标准分类号

V38

发布单位

US-SAE

引用标准

J. R. Henry, "Design of Power Plant Installations, Pressure-Loss Characteristics of Duct Components." NACA Wartime Report L-208, June 1944. J. T. Higgenbotham, C. C. Wood, and E. F. Valentine, "A Study of the High-speed Performance Characteristics of 90"

适用范围

The fluid flow treated in this section is isothermal, subsonic, and incompressible. The effects of heat addition, work on the fluid, variation in sonic velocity, and changes in elevation are neglected. An incompressible fluid is one in which a change in pressure causes no resulting change in fluid density. The assumption that liquids are incompressible introduces no appreciable error in calculations, but the assumption that a gas is incompressible introduces an error of a magnitude that is dependent on the fluid velocity and on the loss coefficient of the particular duct section or piece of equipment. Fig. 1A-1 shows the error in pressure drop resulting from assuming that air is incompressible.With reasonably small loss coefficients and the accuracy that is usually required in most calculations, compressible fluids may be treated as incompressible for velocities less than Mach 0.2. Athigher velocities and for large loss coefficients (Kt and 4fUD), compressible flow analysisshould be used.