Failure of Spray Droplets to Impact the Cylindrical Sampler in the Iipmersion Sampling Technique
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概要
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The immersion sampling technique with a cylindrical rotary shutter is quite popular in measuring spray droplet sizes. However some problems with this technique remain unsettled. In this paper the extent to which droplets fail to impact the cylindrical rotary shutter is experimentally investigated. Experiments have been carried out using a steady water jet from a 0.2 mm hole nozzle varing the diameter of the cylindrical shutter from 22.5 mm to infinity (flat plate) and the sampling distance from 800 mm to 2, 300 mm.<BR>From the results obtained the following can be concluded:<BR>(1) Contrary to expectation, failure of droplets to impact is fairly rare.<BR>(2) Though failure to impact increases with an increase in shutter diameter, the rate of increase is very small after the shutter diameter exceeds about 30 mm.<BR>(3) Since failure to impact occurs over the whole range of droplet size, arithmetic and Sauter mean diameter and size distribution are not affected significantly by the existence of the rotary shutter.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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