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Initiation of Flash Boiling of Multicomponent Miscible Mixtures with Application to Transportation Fuels and Their Surrogates

Published on Sep 20, 2018in Energy & Fuels3.021
路 DOI :10.1021/acs.energyfuels.8b02258
C. Thomas Avedisian14
Estimated H-index: 14
(Cornell University),
Kyle Skyllingstad1
Estimated H-index: 1
(Cornell University)
+ 2 AuthorsMichael J. Carrier5
Estimated H-index: 5
(NIST: National Institute of Standards and Technology)
Abstract
This paper presents methodologies to predict thermodynamic conditions that initiate flash boiling by spontaneous nucleation of liquids consisting of hundreds of miscible liquids and their lower order surrogate mixtures. The methods are illustrated with a kerosene-based fuel and a seven-component surrogate for it. The predictions are compared to measurements of nucleation temperatures obtained from a pulse-heating technique that rapidly heats a microscale platinum film immersed in a pool of the test fluid. Nucleation temperatures are predicted using a generalized corresponding states principle (GCSP), and a modification of classical nucleation theory that considers the mixture as a pseudo single component fluid (PSCF). The intent is to offer a simple means to predict the initiation of flash boiling that can have important consequences for fuel efficiency in combustion engines. We show that contact angle has a strong effect such that predicted and measured spontaneous nucleation temperatures agree for a giv...
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#1Qieni Lu (TJU: Tianjin University)H-Index: 1
#2Xiaoxue Yu (TJU: Tianjin University)H-Index: 1
Last. Baozhen Ge (TJU: Tianjin University)H-Index: 1
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Abstract Flash boiling is an effective way to improve the atomization quality. Droplet diameter and velocity distribution of the flash boiling spray extremely impact the mixture formation of direct injection engines. We visualize and measure the spatial distribution of the droplet size and velocity of flash boiling spray with extended glare-point imaging technique in this paper. An improved correlation-based processing algorithm for droplet identification is proposed. The algorithm is capable of...
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