Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
Hybrid rocket forms the boundary layer combustion on the fuel surface because it is composed of liquid oxidizer and solid fuel. Liquefying polymers like paraffin are recently employed as hybrid rocket fuel due to higher regression rate compared to conventional fuels. In general, a droplet entrainment mechanism is proposed to occur on the fuel surface. It is considered that many droplets contribute to increased regression rate. However, the combustion detailed process is still unclear. The estimation of the thermo-physical properties and the phase conversion is required for highly precise prediction of regression rate. Therefore, to examine the melting fuel behavior, a two-dimensional chamber with observation window was performed at 40~50 kg/m2s, 2.0 MPa, and 10,000 fps. In addition, the temperature profiles near the fuel surface were measured using a thermocouple. The results support to obtain a better understanding the combustion process for hybrid rocket.
