关键词: 加力燃烧室, 支板一体化稳定器, 喷射角度, 来流压力, 余旋角

Abstract:

As traditional structures encounter numerous challenges with continuous improvement of inlet parameters in afterburners， integrated design has become the mainstream trend. However， research on integrated strut flameholder with unconventional parameters is still relatively scarce， and there is a notable scarcity in the variety of trailing edge configurations explored. Therefore， this study presents a design for trailing edge configuration of an integrated strut flameholder used in afterburner. The characteristics of liquid spray distribution under varied conditions are investigated， including inlet cosine rotation angles ranging from -25° to 25°， inlet pressures from 0.1 to 0.7 MPa， fuel injection angles from 30° to 150°， nozzle diameters from 0.5 to 1.4 mm， and liquid-to-air momentum ratios from 33 to 124. Additionally， seven other trailing edge configurations are compared to study their potential influences on jet atomization. The experiments demonstrate that increasing inlet pressure and negative inlet cosine rotation angle （leeward side） result in reduced jet trajectory and penetration depth. Conversely， increasing nozzle diameter and the reverse fuel injection angle between 90° and 110°， along with the positive inlet cosine rotation angle below 25°， lead to increased jet penetration depth， higher trajectory， and gradual enlargement of the void area. The different trailing edge configurations named A–I in this article have minimal impact on the outer trajectory of the jet， but significantly affect the inner boundary. The liquid-to-air momentum ratio plays a critical role in jet penetration depth， while the Weber number has a less influence.

Key words: afterburner, integrated strut flameholder, injection angle, inlet pressure, cosine rotation angle