After all, it was concluded that the spray volume and entrainment air of the spray impinging before break-up increased than those of the free spray. However, the spray impinging after break-up had no effect on increment of both spray volume and entrainment air. On the contrary, the volume and entrainment air of the spray after impingement increased slowly than those of the free spray.
4. CONCLUSION
As for sprays impinging to a vertical wall, the spray volumes and entrainment air were investigated in order to clarify the spray characteristics after impingement. Also, the entrained air mass was analyzed quantitatively. The results are as follows.
(1) Spray tip penetration was affected not only by injection rate at the early stage of the injection but also by injection rate history.
(2) For the spray volume and entrainment air, they increased on the sprays impinged before break-up.
(3) When the spray impinged after break-up, the spray volume and entrainment air increased slowly than those of the free spray.
(4) When the injection rates at early stages were the same with each other, the entrainment air as well as spray volume was dependent on injection rate history.
5. REFERENCE
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