Abstract:

The combustion characteristics of polymethyl methacrylate(PMMA) in the SFRJ were investigated using a direct tube test facility. The effect of factors, such as fuel port diameter, aft-mixing combustion chamber pressure, and air mass flow rate, on regression rate and performance was investigated. The pressure, temperature, local regression rate and their average value were got. The results show that the fuel mean regression rate decreases with the increase in fuel port diameter, but the aft-mixing combustion chamber pressure and temperature were enhanced. In addition, the pressure and temperature of aft-mixing combustion chamber decreased under the condition of low pressure (less than 0.8 MPa), but this effect was limited. It is first found that an erosion effect phenomenon is produced in the SFRJ combustion chamber when the fuel port diameter is smaller (Dp<=30mm).

Key words: ordnance science and technology, SFRJ, PMMA, direct tube test facility, regression rate