It is difficult to determine the best switching time of regenerative combustion system all the time.To solve this problem

the method t o estimate best switching time by numerical simulation was proposed.Through usi ng different mathematical methods

the best switching time of two different rege nerator models were estimated

and the best switching time in two kinds of condi tions was identified as 40 s and 39 s respectively.Research results can serve a s more objective reference than empirical method to the practical engineering ap plications.