MIL-R-25134B (AMENDMENT 2)

上一篇: MIL-R-25134B
下一篇: MIL-R-25988/1A

Product Code:SAE AIR1168/2
Title:Heat and Mass Transfer and Air-Water Mixtures
Issuing Committee:Ac-9 Aircraft Environmental Systems Committee
Scope:Heat transfer is the transport of thermal energy from one point to another. Heat is transferred only under the influence of a temperature gradient or temperature difference. The direction of heat transfer is always from the point at the higher temperature to the point at the lower temperature, in accordance with the second law of thermodynamics. The fundamental modes of heat transfer are conduction, convectoin, and radiation. Conduction is the net transfer of energy within a fluid or solid occurring by the collisions of molecules, atoms, or electrons. Convection is the transfer of energy resulting from fluid motion. Convection involvs the processes of conduction, fluid motion, and mass transfer. Radiation is the transfer of energy from one point to another in the absence of a transporting medium. In practical applications several modes of heat transfer occur simultaneoulsy. For example, aerodynamic heating of a vehicle surface includes convection to the surface, radiation away from the surface, and conduction through the surface structure. Since the three modes of heat transfer obey different laws, a real insight into such a problem can be gained only after they have been studied separately.Product Code:SAE AIR1047
Title:A Guide for the Selection of Quick-Disconnect Couplings for Aerospace Fluid Systems
Issuing Committee:G-3, Aerospace Couplings, Fittings, Hose, Tubing Assemblies
Scope:The factors involved in the selection of a quick-disconnect are grouped into the following classifications for the purpose of discussion: a. functional considerations; b. weight considerations; c. environmental performance factors; d. end fitting types; and e. additional considerations.