Abstract
Based on numerical simulation and laboratory test, the radial distortion of air flow in a double inlet syngas compressor is analysed in this paper. The author also considers the compressor’s mechanical response to homogeneous inflow, mixed inflow, and the length of mixing chambers. Finally, the feasibility of the numerical simulation is verified, drawing such conclusions: The efficiency and pressure rise of a compressor with distorted inlet will decrease by 6.1% and 210Pa, respectively, in the case of mixed inflow, indicating that the inlet flow field of the compressor and the one of subsequent fans match poorly, which is a direct cause to the degrade in overall compressor performance; the mixing speed is ascending from outer diameter to inner diameter at 90 degrees or above in the circumferential direction and descending at 270 degrees or above; the internal diameter velocity is higher than the external diameter velocity in the radial direction; the maximum flow rate measured by turbine flow meter is 0.201kg/s and the minimum one is 0.0256kg/s. The maximum inflow rate is 0.089kg/s and the minimum one is 0.064kg/s. The total pressure loss of compressor inflow is in positive proportion to the length of the mixing chamber. The longer the mixing chamber is, the greater the loss coefficient is. When the length of the mixing chamber is fixed, the loss coefficient is inversely proportional to Re.
