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总温.
总温(亦称停滞温度、滞温、全温)(对应英文的Total Temperature、Stagnation Temperature),是一个与空气动力学相关的名词。
流体在流动时具有它的压力、温度、密度、速度、马赫数。如能使一流体以绝热过程完全静止时,那么它的动能将转化为内能,反映在压力、温度与密度上。此时之温度便为总温。[1]:501实际例子为航空器的皮托管在前端量测的便是总温与总压。
流体总温与静温的关系式为与马赫数有关的函数:
[1]:529
其中:
![{\displaystyle T}](https://wikimedia.org/api/rest_v1/media/math/render/svg/ec7200acd984a1d3a3d7dc455e262fbe54f7f6e0) |
= 静温(Static Temperature)(以绝对温标表示)
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![{\displaystyle T_{\mathrm {0} ))](https://wikimedia.org/api/rest_v1/media/math/render/svg/d29c5dfa71e67e42554db2da8b5aac8134c12ce6) |
= 总温(以绝对温标表示)
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![{\displaystyle M}](https://wikimedia.org/api/rest_v1/media/math/render/svg/f82cade9898ced02fdd08712e5f0c0151758a0dd) |
= 马赫数
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![{\displaystyle \gamma }](https://wikimedia.org/api/rest_v1/media/math/render/svg/a223c880b0ce3da8f64ee33c4f0010beee400b1a) |
= 绝热指数(热容比)(heat capacity ratio、adiabatic index、ratio of specific heats)(空气约为1.4)
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- ^ 1.0 1.1 Jonh Anderson. Fundamentals of Aerodynamics,4th. Edition. New York: McGRAW-Hill. 2005. ISBN 0071254080.
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