Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Rheological Investigation of Aluminized Paraffin Wax Fuel on Particle Size and Contents

파라핀/알루미늄 연료의 알루미늄 입자크기 및 함유비 변화에 따른 유변학적 특성

  • Ryu, Sunghoon (Graduate School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Han, Seongjoo (Graduate School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Moon, Heejang (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Kim, Jinkon (School of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Kim, Junhyung (Agency for Defense Development) ;
  • Ko, Seungwon (Agency for Defense Development)
  • Received : 2017.11.20
  • Accepted : 2018.01.19
  • Published : 2018.04.01
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Abstract

Viscosity measurements were conducted to investigate the rheological characteristics of aluminized paraffin wax fuel. To identify the effect of size and contents of the aluminum particles on the variation of viscosity, samples of nano- and micro- sized aluminum particles with an average particle size of 100 nm and $8{\mu}m$ were prepared and measured using a rheometer. The observed viscosity increment patterns of the nano- and micro-sized particles were vey different, and particularly above 10 wt%, where a relatively low overall regression rate is expected for nano- content fuel. It is possible that this phenomenon could cause the reduced entrainment regression rate.

본 연구에서는 하이브리드 로켓용 파라핀/알루미늄 연료의 유변학적 특성 파악을 위한 점도 측정을 수행하였다. 혼합된 알루미늄 입자의 크기와 첨가량에 따른 유변학적 특성을 파악하기 위해 평균 입도 100 nm, $8{\mu}m$의 나노 및 마이크로 크기 알루미늄 입자첨가 시료를 제작하였으며, 회전형 레오미터를 사용해 점도를 측정하였다. 나노 및 마이크로 입자 함유비에 따른 증가율 패턴은 대단히 상이하였으며 입자의 함유비 10 wt%를 경계로 점도 증가율이 구분되었고, 나노입자 첨가 시 연료의 유입 후퇴율 감소에 따른 총 후퇴율의 저하를 예상할 수 있었다.

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