Array impinging jets have been applied to combustors, vanes and blades of gas turbines that require high cooling performance. However, the jet is deflected toward the downstream direction owing to the influence of the crossflow, which decreases the cooling performance. In this study, a corrugated structure is proposed to increase the space between the jet holes by securing the space for the spent air. The average Reynolds number of each jet hole is 10,000 and numerical simulations are conducted by ANSYS-CFX 17.2. The modified corrugated structure that has an additional plate-making secondary channel for the spent air shows a higher Nusselt number than the corrugated structure. Furthermore, a greater distance of impinging and jet plate (h/d) shows a higher Nusselt number at the stagnation region owing to the development of the jet flow. Therefore, the modified corrugated structure with a smaller distance of impinging and jet plate (h/d) shows greater heat transfer than the corrugated structure.
|Number of pages||9|
|Journal||Transactions of the Korean Society of Mechanical Engineers, B|
|Publication status||Published - 2019 Jan 1|
All Science Journal Classification (ASJC) codes
- Mechanical Engineering