Proceedings of the Korean Society of Propulsion Engineers Conference (한국추진공학회:학술대회논문집)

The Korean Society of Propulsion Engineers (한국추진공학회)
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An Experimental Study of the Micro Turbojet Engine Fuel Injection System

  • Choi, Hyun-Kyung (Department of Aerospace Engineering, Chonbuk National University) ;
  • Choi, Seong-Man (Department of Aerospace Engineering, Chonbuk National University) ;
  • Lee, Dong-Hun (Samsung Techwin Co., Ltd, Power Systems R&D Center)
  • Published : 2008.03.30
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Abstract

An experimental study was performed to develop the rotational fuel injection system of the micro turbojet engine. In this system, fuel is sprayed by centrifugal forces of engine shaft. The test rig was designed and manufactured to get droplet information on combustion space. This experimental apparatus consist of a high speed rotational device(Air-Spindle), fuel feeder, rotational fuel injector and acrylic case. To understand spray characteristics, spray droplet size, velocity and distribution were measured by PDPA (Phase Doppler Particle Analyzer) and spray was visualized by using Nd-Yag laser-based flash photography. From the test results, the length of liquid column from injection orifice is controlled by the rotational speeds and Sauter Mean Diameter(SMD) is decreased with rotational speed. Also, Sauter Mean Diameter is increased as increasing mass flow rate at same rotational speeds.

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