SAE AIR 1168/1-1990
不可压缩和可压缩液流热力学

Thermodynamics of Incompressible and Compressible Fluid Flow

SAE AIR 1168/1-1990 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 price of equipment. 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. At higher velocities and for large loss coefficients (Kt and 4fL/D), compressible flow analysis should be used.

SAE AIR 1168/1-1990由美国机动车工程师协会 US-SAE 发布于 1990-03-31。

SAE AIR 1168/1-1990 在中国标准分类中归属于: V38 液压、冷气系统及其附件，在国际标准分类中归属于: 49.080 航空航天用流体系统和零部件。

SAE AIR 1168/1-1990的历代版本如下：

• 1989年03月01日 SAE AIR 1168/1-1989
• 1990年03月31日 SAE AIR 1168/1-1990 不可压缩和可压缩液流热力学

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标准号

SAE AIR 1168/1-1990

发布日期

1990年03月31日

实施日期

废止日期

无

中国标准分类号

V38

国际标准分类号

49.080

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 price of equipment. 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. At higher velocities and for large loss coefficients (Kt and 4fL/D), compressible flow analysis should be used.

SAE AIR 1168/1-1990系列标准