contributor author | Lad, B. | |
contributor author | He, L. | |
date accessioned | 2017-05-09T01:03:19Z | |
date available | 2017-05-09T01:03:19Z | |
date issued | 2013 | |
identifier issn | 0889-504X | |
identifier other | turb_135_1_011022.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/153383 | |
description abstract | The development of a high pressure turbine requires the accurate prediction of flow within and around film cooling holes. However, the length scales inherent to film cooling flows produce a large disparity against those of the mainstream flow; hence they cannot be resolved by a mesh generated for an aerodynamics analysis. Furthermore, the process of meshing cooling holes is not only time consuming but cumbersome; thus making the parametric study of film cooling effectiveness for a given blade geometry, using hole geometry and distribution, very difficult in a design environment. In this paper an immersed mesh block (IMB) approach is proposed which allows the refined mesh of a cooling hole to be immersed into the coarser mesh of a nozzle guide vane (NGV) and solved simultaneously while maintaining mass conservation. By employing twoway coupling, the flow physics in and around cooling holes is able to interact with the mainstream; hence the length scales of both types of flow are appropriately resolved. A generic cooling hole design can then be mapped to a given aerofoil geometry multiple times to achieve an appropriate distribution of cooling holes. The results show that for a realistic transonic blade, a configuration consisting of up to 200 cooling holes can be efficiently and accurately calculated—while retaining the original aerodynamic mesh but with a much enhanced resolution for the film cooling. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Use of an Immersed Mesh for High Resolution Modeling of Film Cooling Flows | |
type | Journal Paper | |
journal volume | 135 | |
journal issue | 1 | |
journal title | Journal of Turbomachinery | |
identifier doi | 10.1115/1.4006398 | |
journal fristpage | 11022 | |
journal lastpage | 11022 | |
identifier eissn | 1528-8900 | |
tree | Journal of Turbomachinery:;2013:;volume( 135 ):;issue: 001 | |
contenttype | Fulltext | |