空気マイクロメータ内の流体の作動 : 第5報, 二つの絞りの総合的特性ならびに設計法

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Combining the experimental characteristic formulas of nozzles, orifices and double-disc nozzles for the air-micrometer which were obtained in the last four reports, characteristic equations were worked out for the low-pressure type and high-pressure type air-micrometers and the values calculated from these equations were compared with the experimental values and the following were made clear : 1. In the range of practical use, the values of R_<ea> (Reynolds number of nozzle or orifice) ranse from 800 to 7000,(h/d_1)R_<eb> (R_<eb> : Reynolds number of double-disc nozzle) is below 100 for the low-pressure type air-micrometer and p_2/p_1,p_3/p_2 range approximately from 0.5 to 0.95 and from 0.3 to 0.75 respectively for the high-pressure type air-micrometer. 2. The values calculated from the characteristic equations which are found through individual investigations and subsequent combinations of the characteristics of nozzle or orifice and double-disc nozzle show good agreement with measured values in these reports. Comparing with the conventional characteristic equations, these equations show closer approximation and make it possible to accurately calculate the characteristics of air-micrometer in accordance with the types of nozzle or orifice and double-disc nozzle. 3. Thus some design charts calculated from these empirical formulas were prepared, and any desired air-micrometer can be readily designed by using these charts.
一般社団法人日本機械学会の論文
1964-02-25

著者

中山泰熹
鉄道技術研究所

空気マイクロメータ内の流体の作動 : 第5報, 二つの絞りの総合的特性ならびに設計法

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