 theori stagnat point heat transfer dissoci air theori stagnat point heat transfer dissoci air boundari-layer equat develop gener case high speed flight extern flow dissoci effect diffus atom recombin boundari layer includ stagnat point equat reduc exactli set nonlinear ordinari differenti equat chemic reaction proce slowli boundari layer thermochem equilibrium method numer solut stagnat point equat present equilibrium case nonequilibrium case numer correl term paramet enter numer formul depend critic physic assumpt nonequilibrium boundari layer catalyt atom recombin noncatalyt wall surfac consid solut repres transit frozen boundari layer slow recombin rate equilibrium boundari layer fast recombin rate recombin rate paramet introduc interpret nonequilibrium scale factor involv relat equilibrium boundari layer bodi size conclud heat transfer equilibrium stagnat point boundari layer comput accur simpl correl formula heat transfer unaffect nonequilibrium boundari layer provid wall catalyt lewi number uniti 