National Transport Library Research Database

Avancerad sprayforskning (Advanced spray research)

  • Chalmers tekniska högskola AB, Universitet eller högskola, 556479-5598
Sponsors, duration, budget: Energimyndigheten ; 2011-01-01 -- 2013-12-31 ; 2565000 kronorRegistration number:
  • Energimyndigheten 2010004584
Subject(s): Abstract: Syftet med projektet är att studera det komplexa fluidmekaniska fenomen som uppkommer vid insprutning av olika bränslesprayer i direktinsprutade motorer. I projektet kommer detaljerade mätningar och utveckling av teoretiska modeller att genomföras vilket skapar förutsättningar för utveckling av nya koncept för bränsle-luft-preparering. Abstract: The process of fuel/air mixture preparation via an atomizing spray controls combustion efficiency (hence CO2 reduction) and emissions formation in direct injected engines. Understanding of spray breakup is one of the weakest links in understanding of combustion, and yet key parts of it have been avoided because spray breakup research presents unique difficulties. Now is a critical time to take up this challenge as both fuels and engines are changing rapidly. Professor Linne´s group has recently developed techniques to overcome these experimental difficulties. The project investigates a sequence of flowfields, starting with the most basic and adding complexity in steps. Each step will be taken intentionally to pull theorists further into the complexity of an atomizing spray; to fully evaluate dynamics and to stimulate the evolution of predictive models. Collaboration with a number of leading theorists from around the world (not funded by this proposal) is planned in order to ensure that the project proceed in parallel with the appropriate level of model development. The proposed work will focus on very basic steady liquid sprays (using water, glycerol, acetone etc., to cover a range of fluid properties) as they issue into air at one bar. The decision to start here was based upon input from the theory partners, because this kind of very basic work is a necessary first step towards development of genuinely predictive models for primary breakup.
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