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Comparison of Performance of Two Aerodynamically Similar 14-inch-diameter Single-stage Compressor Rotors of Different Chord Length

出版	National Advisory Committee for Aeronautics, 1958
URL	http://books.google.com.hk/books?id=glDcSgAACAAJ&hl=&source=gbs_api

註釋The performance of two aerodynamically similar single-stage rotors of different chord length was compared. The short-chord rotor was of a design typical for a last stage of a multistage compressor. The long-chord rotor, with a chord 2.5 times that of the short-chord rotor, achieved a higher pressure ratio and operated over a greater equivalent-weight-flow range than the short-chord rotor at every speed investigated. The equivalent weight flow of the long-chord rotor was lower at the peak-pressure-ratio end and higher at the low-pressure-ratio end of the performance curves. The two rotors had approximately the same peak efficiencies. The stall and surge characteristics were similar, both rotors experiencing abrupt stall as the flow was decreased. The pressure ratio after stall decreased to the same value for both rotors.