Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Numerical Study on Thrust Characteristics of an E-D Nozzle for Altitude Compensation

고도 보정용 E-D 노즐의 추력 특성에 대한 수치해석 연구

  • Hwang, Heuiseong (School of Aerospace Engineering, Graduate School at Chungnam National University) ;
  • Huh, Hwanil (School of Aerospace Engineering, Chungnam National University)
  • Received : 2016.04.01
  • Accepted : 2016.05.15
  • Published : 2016.06.01
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Abstract

A study on the effect of altitude-compensation and the possibility of throttling is performed by designing an E-D nozzle that is a type of altitude-compensation nozzles. In order to examine the effect of the altitude-compensation, a CFD analysis is conducted by using three kinds (sea level, altitude at 10 km and 16 km) of the atmosphere condition while maintaining the chamber pressure. Results show that the effective nozzle exit area is also gradually increased when the altitude get increased. Understanding the possibility of throttling, a CFD analysis is conducted by moving the location of the pintle. Just as same as a general pintle thruster, the chamber pressure and thrust are increased when the nozzle throat area get decreased.

본 논문에서는 E-D 노즐을 설계하여 고도 보정에 대한 효과와 Throttling에 대한 가능성 연구를 수행하였다. 고도 보정에 대한 효과를 확인하기 위하여 연소실 압력을 일정하게 유지하며, 총 3가지(해수면, 고도 10 km, 고도 16 km)의 외부 대기환경 조건을 이용하여 해석적 연구를 수행하였다. 그 결과 고도가 상승할수록 유효 노즐 출구 면적 역시 점점 증가하였으며 이로 인하여 추력도 증가하였다. 또한 Throttling에 대한 가능성을 파악하기 위하여 핀틀의 위치를 연소실 쪽으로 후진시켜 노즐 목 면적을 작게 모델링하여 해석적 연구를 수행하였다. 일반적인 핀틀 추력기와 동일하게 노즐 목 면적이 줄어들수록 연소실 압력이 상승하며 추력 역시 증가하였다.

Keywords

References

  1. Schomberg, K., Doig, G. and Olsen, J., "Geometric Analysis of the Linear Expansion-Deflection Nozzle at Highly Overexpanded Flow Conditions," 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, AIAA 2014-4001, Jul. 2014.
  2. Schorr, C.J., "Constant Chamber Pressure Throttling of an Expansion-Deflection Nozzle," Journal of Spacecraft and Rockets, Vol. 7, No. 7, pp. 843-847, 1970. https://doi.org/10.2514/3.30051
  3. Schomberg, K., Olsen, J., Neely, A. and Doig, G, "Experimental Analysis of a Linear Expansion-Deflection Nozzle at Highly Overexpanded Conditions," 19th Australasian Fluid Mechanics Conference, Melbourne Australia, Dec. 2014.
  4. World Wide Web location http://www.bristol.ac.uk/news/2010/7059.html/
  5. Wagner, B., Stark, R. and Schlechtriem, S., "Experimental study of a planar expansiondeflection nozzle flow field," 4th EUROPEAN CONFERENCE FOR AEROSPACE SCIENCE, Saint Petersbrug, Russia, Jul. 2011.
  6. Lee, J., "A Study on the Static and Dynamic Characteristics of Pintle-Perturbed Conical Nozzle Flows," Ph.D. Dissertation, Dept. of Mechanical Engineering, Yonsei Univ., Seoul, ROK, 2012.
  7. Kim, J., "Study on the effects of pintle shapes and position in nozzle flowfield, and thrust in a solid rocket motor with pintle nozzle," Ph.D. Dissertation, Dept. of Mechanical Design Engineering, Chungnam Univ., Daejeon, ROK, 2011.
  8. Choi, J., Hwang, H. and Huh, H., "Technology Review of and E-D Nozzle for Altitude Compensation Purpose," 2015 The Korean Society of Propulsion Engineers Spring Conference, Pusan, Korea, pp. 80-83, May. 2015.
  9. Hwang, H. and Huh, H., "Experimental Study on Unsteady-state Characteristics of a Pintle Thruster with Variable Pintle Speeds," Journal of The Korean Society for Aeronautical and Space Sciences, Vol. 44, No. 3, pp. 247-255, 2016. https://doi.org/10.5139/JKSAS.2016.44.3.247