Numerical simulation of conjugate heat transfer for an internally cooled 3-D turbine blade

To study the internal cooling technology of turbine blade,three types of blades,i.e.non-cooled blade using adiabatic boundary condition,non-cooled blade using conjugate heat transfer method,and air-cooled blade using conjugate heat transfer method,were studied.The results show that heat conductivity of the blade has a significant influence on blade temperature distribution;the structure of rib-roughened cooling and latticework cooling makes the blade temperature drop markedly.However,this leads to increased non-uniformity of blade temperature distribution and irregular heat transfer coefficient distribution on the blade surface.