OS9-02 L2F計測によるディーゼル噴霧分裂モデルの検証(OS9 動力エネルギーシステムにおける熱流動)

抄録

A laser 2-focus velocimeter (L2F) with micro-scale probe volume has been developed for measurements of velocity and size of droplets in a dense spray. Diesel fuel spray injected in the atmosphere from the nozzle with a 0.2mm single hole was measured by the L2F at 20, 30 and 40mm downstream from the nozzle exit. The theoretical analysis was done by using the 3D-CFD based on KIVA-3 code in combination with the enhanced Taylor analogy breakup (ETAB) model proposed by F. X. Tanner, and the result was compared with that of the L2F measurement. It is clearly shown that the measured and calculated droplet size distributions agree well each other when the ratio of the product-parent droplet mean radii is set to about 0.6 for the region of boundary layer stripping breakup.