Design and Performance of an Improved Trapped Vortex Combustor

作     者：JIN Yi HE Xiaomin JIANG Bo WU Zejun DING Guoyu 

作者机构：College of Energy and Power Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China 

基　　金：Aeronautical Science Foundation of China (2008ZB52013) Funding of Jiangsu Innovation Program for Graduate Education (CXLX11_0211) 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2012年第25卷第6期

页      码：864-870页

摘      要：A trapped vortex combustor （TVC） has been a very promising novel concept for it offers improvements in lean blow out, altitude relight, operating range, as well as a potential to decrease NOx emissions compared to conventional combustors. The present paper discusses the improved designs of the new combustor over the prior ones of our research group, including that：a） the over-all dimensions, both axial and radial, are reduced to those of an actual aero-engine combustor; b） the air flow distribution is optimized, and especially 15% of the air is fed into the liner as cooling air; c） a straight-wall diffuser with divergence angle 9°is added. A series of experiments （cavity-fueled only, under atmospheric pressure） has been conducted to investigate the performance of the improved TVC. Experimental results show that at the inlet temperature of 523 K, the inlet pressure of 0.1 MPa, stable operation of the TVC test rig is observed for the Mach number 0.15-0.34, indicating good flame stability; the combustion efficiency obtained in this paper falls into the range of 60%-96%; as the total excess air ratio increases, the combustion efficiency decreases, while the increase of the inlet temperature is beneficial to high combustion efficiency; besides, the optimal Mach numbers for high combustion efficiency under different inlet conditions are confirmed. The outlet temperature profiles feature a bottom in the midheight of the exit. This paper demonstrates the feasibility for the TVC to be applied to a realistic aero-engine preliminarily and provides reference for TVC design.

主 题 词：combustion trapped vortex combustor improved design performance experimental demonstration 

学科分类：082502[082502] 082304[082304] 08[工学] 080204[080204] 0802[工学-机械学] 0825[工学-环境科学与工程类] 0823[工学-农业工程类] 

核心收录：

D　O　I：10.1016/S1000-9361(11)60456-1

馆 藏 号：203817751...