Based on conjugate heat transfer

numerical investigation was carried out on a highly integrated first stage vane with thermal barrier coating (TBC). The numerical results showed that

under the condition close to real engine operation where temperature and pressure were very high

the effect of TBC on the areodynamic features in the cascade can be neglected. However

as the mass flow rate of cooling air decreased within a certain range

TBC could still reduced the temperature and heat transfer coefficient near the leading edge conspicuously. With the decrease of the coolant flow rate

the effect of TBC on the trailing edge of pressure side dropped heavily

but slowly on suction side. A quantitative comparison of the metal temperature averaged over three spanwise sections indicates that

with the equivalent overall cooling effectiveness achieved

TBC with a thickness of 015mm can save the mass flow rate of coolant by 20%-30%.