Numerical simulation on flow and heat transfer in channel with small spacing short pin-fin arrays

Numerical simulation was conducted to gain greater insight into the flow structure of trapezoidal pin-fin duct and get detailed knowledge of the heat transfer on the endwall surface. The array geometries have short pin heights and small chord-wise pin spacing. Numerical results show that, the calculated flow resistances and chord-wise ejection mass flow rate agree well with the experimental data, and the heat transfer pattern is well simulated. The numerical results also show that the flow direction in pin-fin region is mainly chord-wise. There are a lower velocity and lower turbulence intensity region behind the cylinder.