Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Experimental Study on Heat Transfer Characteristics of Jet A-1 Fuel

Jet A-1 연료의 열전달 특성에 관한 실험적 연구

  • Lee, Junseo (School of Mechanical Engineering, Chungbuk National University) ;
  • Lee, Bom (School of Mechanical Engineering, Chungbuk National University) ;
  • Ahn, Kyubok (School of Mechanical Engineering, Chungbuk National University)
  • Received : 2020.05.27
  • Accepted : 2020.07.16
  • Published : 2020.10.31
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Abstract

In this paper, the heat transfer characteristics of Jet A-1, which is used as a coolant and fuel in a regeneratively cooled thrust chamber, were experimentally studied. By varying the applied current for heating the cooling channel, the simulated specimen diameter, the specimen outlet pressure and the coolant flow rate, the wall temperatures of the specimen and the Jet A-1 temperatures at the specimen inlet/outlet were measured. It was found that the specimen diameter and the flow rate were important factors for the characteristics of heat transfer and the outlet pressure did not affect the performance of heat transfer. The results of the heat transfer experiments were compared with the previous Nusselt number empirical equations and novel Nusselt number empirical equations were finally derived.

본 논문에서는 재생냉각 연소기에서 냉각제 및 연료로 사용되는 Jet A-1의 열전달 특성에 대해 실험적으로 연구하였다. 냉각채널 가열을 위한 인가 전류, 모사 시편 지름, 시편 후단 압력, Jet A-1 유속을 변화시키며, 시편에서의 벽면 온도 및 시편 전/후단에서의 Jet A-1 온도를 측정하였다. 시편 지름과 유속이 열전달 특성에 중요한 인자임을 알 수 있었으며, 시편의 후단 압력은 열전달 성능에 영향을 주지 않음을 확인할 수 있었다. 열전달 실험결과는 기존 Nu수 경험식들과 비교하였으며, 최종적으로 새로운 Nu수 경험식을 도출하였다.

Keywords

Acknowledgement

본 논문은 과학기술정보통신부의 재원으로 한국연구재단의 지원(NRF-2013R1A5A1073861, NRF-2018M1A3A3A02065683, NRF-2019M1A3A1A02076962)을 받아서 수행되었으며, 이에 감사드립니다.

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