中国物理B ›› 2011, Vol. 20 ›› Issue (6): 64701-064701.doi: 10.1088/1674-1056/20/6/064701

• CLASSICAL AREAS OF PHENOMENOLOGY • 上一篇    下一篇

Scaling of heat transfer in gas–gas injector combustor

汪小卫, 蔡国飙, 高玉闪   

  1. School of Astronautics, Beihang University, Beijing 100191, China
  • 收稿日期:2010-12-16 修回日期:2011-01-11 出版日期:2011-06-15 发布日期:2011-06-15
  • 基金资助:
    Project supported by the National High Technology Research and Development Program of China (Grant No. 2008AA7023) and the Innovation Foundation of Beihang University for Ph. D. Graduates (Grant No. 430569).

Scaling of heat transfer in gas–gas injector combustor

Wang Xiao-Wei(汪小卫), Cai Guo-Biao(蔡国飙), and Gao Yu-Shan(高玉闪)   

  1. School of Astronautics, Beihang University, Beijing 100191, China
  • Received:2010-12-16 Revised:2011-01-11 Online:2011-06-15 Published:2011-06-15
  • Supported by:
    Project supported by the National High Technology Research and Development Program of China (Grant No. 2008AA7023) and the Innovation Foundation of Beihang University for Ph. D. Graduates (Grant No. 430569).

摘要: The scaling of heat transfer in gas-gas injector combustor is investigated theoretically, numerically and experimentally based on the previous study on the scaling of gas-gas combustion flowfield. The similarity condition of the gas-gas injector combustor heat transfer is obtained by conducting a formulation analysis of the boundary layer Navier-Stokes equations and a dimensional analysis of the corresponding heat transfer phenomenon. Then, a practicable engineering scaling criterion of the gas-gas injector combustor heat transfer is put forward. The criterion implies that when the similarity conditions of inner flowfield are satisfied, the size and the pressure of gas-gas combustion chamber can be changed, while the heat transfer can still be qualitatively similar to the distribution trend and quantitatively correlates well with the size and pressure as qpc0.8dt-0.2 . Based on the criterion, single-element injector chambers with different geometric sizes and at different chamber pressures ranging from 1 MPa to 20 MPa are numerically simulated. A single-element injector chamber is designed and hot-fire tested at seven chamber pressures from 0.92 MPa to 6.1 MPa. The inner wall heat flux are obtained and analysed. The numerical and experimental results both verified the scaling criterion in gas-gas injector combustion chambers under different chamber pressures and geometries.

Abstract: The scaling of heat transfer in gas–gas injector combustor is investigated theoretically, numerically and experimentally based on the previous study on the scaling of gas–gas combustion flowfield. The similarity condition of the gas–gas injector combustor heat transfer is obtained by conducting a formulation analysis of the boundary layer Navier–Stokes equations and a dimensional analysis of the corresponding heat transfer phenomenon. Then, a practicable engineering scaling criterion of the gas–gas injector combustor heat transfer is put forward. The criterion implies that when the similarity conditions of inner flowfield are satisfied, the size and the pressure of gas–gas combustion chamber can be changed, while the heat transfer can still be qualitatively similar to the distribution trend and quantitatively correlates well with the size and pressure as qpc0.8dt-0.2 . Based on the criterion, single-element injector chambers with different geometric sizes and at different chamber pressures ranging from 1 MPa to 20 MPa are numerically simulated. A single-element injector chamber is designed and hot-fire tested at seven chamber pressures from 0.92 MPa to 6.1 MPa. The inner wall heat flux are obtained and analysed. The numerical and experimental results both verified the scaling criterion in gas–gas injector combustion chambers under different chamber pressures and geometries.

Key words: similarity, heat transfer, gas-gas combustion, simulation, experiment

中图分类号:  (Reactive and radiative flows)

  • 47.70.-n
44.90.+c (Other topics in heat transfer) 47.27.te (Turbulent convective heat transfer)