Session: 15-07: Numerical Studies of Internal Cooling

Submission Number: 178887

Numerical Study on Heat Transfer Characteristics of Turbine Blade Wedge-Shaped Channel With Pin-Fin 

This study utilizes numerical simulation methods to explore the flow and heat transfer characteristics of a wedge-shaped cooling channel at the trailing edge of a gas turbine blade. Four types of turbulence generator shapes, namely cylindrical, waist-shaped, teardrop I-shaped, and teardrop II-shaped, are considered. Numerical simulations were conducted under coolant flow conditions with Reynolds numbers ranging from 2000 to 8000. The findings reveal that different pin-fin structures yield varying heat transfer enhancement on their own surfaces and also affect the heat transfer on the adjacent channel walls. Within the wedge-shaped channel, the heat transfer on the upper wall is consistently superior to that on the lower wall. In the studied Reynolds number range, the waist-shaped and teardrop I pin fins produce more stable pressure distributions on the channel walls, with the waist-shaped configuration resulting in the lowest flow resistance. Due to its larger leading-edge curvature, the teardrop II pin fin provides the best overall heat transfer enhancement in the channel. Although the waist-shaped pin-fin achieves a high Nusselt number on its own surface, it yields the poorest overall channel heat transfer enhancement. Furthermore, the average Nusselt number on the channel walls increases with Reynolds number for all pin fin geometries.

Presenting Author: Jingye Kang Xinjiang University

Presenting Author Biography: An enthusiastic and lively postgraduate student

Authors:

Jingye Kang Xinjiang University
Lin Li Xinjiang University
Zhuchuan Chang Xinjiang University
Zhimin He Xinjiang University