Qingwei Fan

Experimental and Numerical Study on Novel Combustor for Mixture of Purge Gas and Crude Gas

Abstract In this article, a novel combustor for stable, high efficiency, and low pollution combustion of mixture of purge gas and crude gas is proposed; experiments and numerical simulation were undertaken. Hot wire anemometer was employed to investigate the velocity profiles and some detailed flowing characteristics were studied by using a numerical simulation method. The results of the experiments and simulation agreed well, and an obvious recirculation region was found downstream from the secondary air distributors. The recirculation rate could be adjusted conveniently. Configuration parameters of secondary air distributors were optimized and better flow fields were achieved.

Lean Premixed and Low NOx Combustor with Recirculation Ratio of Fuel Gas Controllable

This work deals with the dynamic behaviors and recirculation rate characters of a lean premixed and low NO x gas turbine combustor. Several experiments are performed varying operation parameters under cold-state and atmospheric pressure condition. Axial velocity and its RSM are measured by constant temperature hot wire anemometer and averaged recirculation velocity is measured by dynamical pressure probe. Characteristics of dimensionless velocity field are found to agree with theoretical analysis of free jet and values of turbulent intensity in flow field are relative low. Recirculation rate is found to be influenced by primary air stoichiometric ratioα1, secondary air stoichiometric ratioα2 and geometric configuration L betwe recirculation baffle and secondary air distributors. The relationship figures are obtained which could be used as a basis for adjusting recirculation rate to achieve a steade and efficient combustion when fuel components change.