EVOLVEMENT OF THE FLOW FIELD DOWNSTREAM A SWIRL CUP IN A MODEL REVERSE FLOW COMBUSTOR
Recently, many researches were focused on the application of reverse flow combustors. The evolvements of flow fields in the primary zones played a key role for the developments of combustors. The aim of this paper is to study the evolvement of the flow field after a swirl cup in a model reverse flow combustor.A Particle Dynamic Analyzer (PDA) was used to measure the mean velocity field, which was composed of 4050 data points distributed uniformly on 1/4 cross section at 10 downstream locations started from 0.18D to 1.8D, where D denotes the diameter of the exit of the swirl cup. An axial-radial swirl cup was used as the dome of a model reverse flow combustor with the cross section area 60×80 mm, and the primary holes were 40mm downstream the exit of the swirl cup.The operation pressure was 200KPa, and the pressure loss was 2.5％.The results shown that the velocity field at the section 0.18D was nearly axisymmetric, no influence of the primary jets could be concluded. With the flow downstream, the velocity field was distorted and squeezed gradually by the primary jets. The peak value, Umax, was located nearby the exit of the air flow from the outer swirler. With the flow moved downward from 0.18D to 1.25D, the peak value of the axial velocity decreased from Umax to 0.5Umax and the radial location moved outward. With the flow moved further downstream from 1.25D to 1.8D, the peak value of the axial velocity experienced an increase-decrease process and the radial location moved inward.
XU Xu HUANG Yong GUO Zhihui MENG Jiangtao
School of Jet Propulsion, National Key Laboratory on Aero-Engines Beijing University of Aeronautics and Astronautics, 10083, China
国际会议
昆明
英文
113-117
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）