Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Spray Image of Gelled Kerosene with Nanoparticles at Multi-hole Pintle Injector

미세입자를 첨가한 케로신 젤 추진제의 멀티 홀 핀틀 인젝터에서의 분무 이미지

  • Hwang, Juhyun (Department of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Choi, Myeunghwan (Department of Smart Drone Convergence, Korea Aerospace University) ;
  • Koo, Jaye (Department of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • Received : 2021.05.11
  • Accepted : 2021.09.14
  • Published : 2021.10.31
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Abstract

This study was carried out to analyze the properties of the gel propellant and spray characteristics according to the addition of fine particles. The multi-hole diameter was 0.4 mm to induce a high shear rate, and a kerosene gel propellant was prepared using 5 wt% of the Thixatrol ST and SUS304 of 100 nm. The experiment was conducted by fixing the supply pressure in the axial direction to 0.7 MPa and adjusting the supply pressure in the radial direction from 0.7 MPa to 2.1 MPa. Due to the addition of fine particles, pressure vibration during spraying, a small TMR(Total Momentum Ratio) of up to 0.19, and a phenomenon that the spraying angle rapidly increased to more than 70 degrees occurred.

미세입자 첨가에 따른 젤 추진제의 물성 분석과 분무의 특성을 분석하고자 실험적 연구를 수행하였다. 멀티 홀의 직경을 0.4 mm로 하여 높은 전단 속도를 유도하였고, 점증제 Thixatrol ST 5 wt%와 100 nm의 SUS304를 사용해 케로신 젤 추진제를 제작했다. 축방향의 공급압력을 0.7 MPa로 고정시킨 후 반경방향의 공급압력을 0.7 MPa부터 2.1 MPa까지 조절하여 분무 실험을 진행하였다. 미세입자 첨가로 인해 압력진동과 최대 0.19의 작은 TMR(Total Momentum Ratio), 그리고 분무 각도가 70도 이상으로 급격하게 커지는 현상이 발생하였다.

Keywords

Acknowledgement

본 연구는 한국연구재단의 4단계 두뇌한국21사업(과제번호 : 5199990714521)의 지원 및 개인기초연구지원사업(2016R1D1A1B04934852)의 지원을 받아 작성되었습니다.

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