A simplified single channel wave rotor combustor (WRC) experimental rig was established, in which the spoilers with different\nblockage ratios (BR) could be conveniently installed and disassembled. The spoilers were firstly used for WRC to improve the\npressure rise. The effects of different blockage ratios on the pressure rise and flame acceleration characteristics in a single\nchannel of the WRC were investigated. The addition of spoilers could remarkably improve the pressure rise and flame\npropagation speed in a single channel of the WRC. While the blockage ratio of the spoiler increases, both pressure rise and\nmean flame propagation speed are improved. When the spoilers with a blockage ratio of 38.91% are used, the peak pressure\nincreases by 200% compared to that of WRC without the spoilers. When the spoilers of different blockage ratios (23.35%,\n31.13%, and 38.91%) are used, it is found that the flame propagation speed is significantly improved with the increasing of the\nblockage ratio. Specifically, the maximum flame propagation speed reaches 55 m/s, and the maximum mean flame propagation\nspeed is 36.95 m/s. Furthermore, combustion becomes more intense, and the flame is brighter around the spoiler.
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