Effect of Diaphragm Thickness on Regression Rate Improvement in Hybrid Rocket Motor

다이아프램 두께 변화에 따른 하이브리드 로켓의 후퇴율 향상에 관한 연구

  • Received : 2015.08.05
  • Accepted : 2015.12.10
  • Published : 2015.12.31


In this work, a study was conducted to investigate the effect of diaphragm thickness on the regression rate of the hybrid rocket motor. To observe the flow pattern and the recirculation zone, visualizations of combustion chambers with different diaphragm thickness (5mm, 10mm) were performed. It was found that the case with 5 mm thickness had a larger recirculation zone and therefore, had a higher regression rate than the case with 10mm thickness due to the increased residence time and heat transfer toward the fuel surface. Finally, it was concluded that the thickness of diaphragm can be a critical parameter for the enhancement of the regression rate.


Hybrid Rocket;Diaphragm;Recirculation Zone;Combustion Visualization;Regression Rate Measurement


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