Mass Transfer Cooling Near the Stagnation Point

A simplified analysis is made of mass transfer cooling--that is, injection of a foreign gas--near the stagnation point for two-dimensional and axisymmetric bodies. The reduction in heat transfer is given in terms of the properties of the coolant gas and it is shown that the heat transfer may be reduced considerably by the introduction of a gas having appropriate thermal and diffusive properties. The mechanism by which heat transfer is reduced is discussed.