Session: 12-01 Turbine Film Cooling

Paper Number: 82755

82755 - Effect of Inlet Preswirl on the Film Cooling Characteristics of Turbine Vane Surface 

At present, swirler is commonly used in the combustion chamber to stabilize the flame structure, accompanied by lower temperature distribution coefficient and better temperature field characteristic at the outlet of combustor. However, the inlet swirl will affect the film cooling performance of vane surface and cascade endwall, especially for the first-stage nozzle guide vane (NGV). Conjugate heat transfer (CHT) analyses were conducted on the first stage vane NASA-C3X to validate the accuracy of SST turbulence model with γ-Reθ transition model in the prediction of aerodynamic performance for internally cooled C3X-1983 vane and heat transfer performance for film cooled C3X-1988 vane, respectively. The influence of inlet swirl on the film cooling performance of C3X-1988 vane was investigated by numerical simulations and the Nu was calculated to analyze the heat transfer coefficient distribution on the vane surface. In particular, the C3X-1988 vane was separated into three different forms (1. C3X vane with only leading-edge film cooling. 2. C3X vane with only film cooling on the suction surface. 3. C3X vane with only film cooling on the pressure surface.) in order to avoid the mutual interference between the film cooling gas of different areas, the effects of inlet swirl positions (swirl aligned to vane leading edge or passage) and swirl orientations (positive or negative) on the film cooling performance in different areas of the vane surface under varied mass flow ratios (MFR=0.5%, 0.75%, 1.0%, 1.25% and 1.5%) were studied respectively.

Presenting Author: Xinnan Chen Institute of Turbomachinery, Xi'an Jiaotong University

Presenting Author Biography: Mr. Xinnan CHEN is a fulltime Master degree student of Institute of Turbomachinery of Xi&#39;an Jiaotong University in China.<br/>Mr. CHEN&#39;s research topics focus on the aerodynamic performance and heat transfer cooling characteristics of turbines.

Authors:

Xinnan Chen Institute of Turbomachinery, Xi'an Jiaotong University
Zhigang Li Institute of Turbomachinery, Xi'an Jiaotong University
Jun Li Institute of Turbomachinery, Xi'an Jiaotong Univ.
Qingzong Xu Institute of Engineering Thermophysics, Chinese Academy of Sciences
Qiang Du Institute of Engineering Thermophysics, Chinese Academy of Sciences