翼列試験の簡易化の一方法

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タイトル別名
  • A Simplified Method of the Cascade Testing
  • ヨクレツ シケン ノ カンイカ ノ イチ ホウホウ

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The present paper deals with a simplified experimental method to determine the cascade characteristics by meams of specially designed probes which swing with an amplitude of one blade spacing at a constant speed in the downstream of blade cascades in order to average the spatial distributions of pressure. A model measuring apparatus was manufactured, and its applicability was examined experimentally. The results are as follows : 1. This method is applicable, if the coefficient of the total pressure loss is smaller than 0.1. 2. In this case, the errors in averaging outlet static pressures and outlet angles due to this method are within the limit of measuring errors. 3. If the coefficient of the total pressure loss is known, the coefficient of the wake momentum loss, which is necessary for obtaining the lift and drag coefficients, can be calculated on a few suppositions. 4. Due to this method, the time required for the measurment is only 1/8∼1/10 of that for any conventional method.

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