Estimation of energy losses during spray formation by homogenous flash boiling process

Yahav Moshkovich, Yeshayahou Levy, Eran Sher

Research output: Contribution to conferencePaperpeer-review

Abstract

When a superheated fluid is driven out through an orifice to a low pressure space, the fluid pressure abruptly drops and depending on the initial conditions, nucleation of vapor bubbles may occur on the orifice walls (heterogeneous nucleation) or in the liquid bulk (homogeneous nucleation). The bubbles undergo a rapid expansion process, which under some circumstances results in a rapid disintegration of the liquid bulk into small droplets (atomization). For a homogeneous nucleation, the vapor bubbles grow rapidly one towards the other, and when they touch each other the liquid layer between two adjacent bubbles is torn apart and a spray with small and uniform droplets is generated. According to Sher and Elata (1977); Sher and Zeigerson-Katz (1996), it's seems that the efficiency of the homogenous flash boiling process is very low. In this work, we analyze this process and analyze it for possible energy losses.

Original languageEnglish
StatePublished - 1 Jan 2017
Externally publishedYes
Event57th Israel Annual Conference on Aerospace Sciences, IACAS 2017 - Tel Aviv and Haifa, Israel
Duration: 15 Mar 201716 Mar 2017

Conference

Conference57th Israel Annual Conference on Aerospace Sciences, IACAS 2017
Country/TerritoryIsrael
CityTel Aviv and Haifa
Period15/03/1716/03/17

ASJC Scopus subject areas

  • Aerospace Engineering

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