VTI National Transport Research Database

Nya analystekniker för mätning av initial upplösning hos bränslesprayer (Initial breakup in transient fuel sprays)

  • Chalmers tekniska högskola AB, Universitet eller högskola, 556479-5598
Sponsors, duration, budget: Energimyndigheten, Vetenskapsrådet ; 2011-01-01 -- 2014-12-31 ; 7693054 kronorRegistration number:
  • Energimyndigheten 2010004525
Subject(s): Abstract: Energieffektivare förbränningsmotorer för tunga fordon har stor potential att mindska koldioxidutsläppen. Målet med projektet är att bidra till utveckling av mer prediktiva modeller för förbränning i direktinsprutade motorer. Den svagaste länken är en effektiv teori för mekaniken i flytande uppdelning nära munstycket på tryckatomiserde injektorer. Fokus är att genom ny mätteknik, "Ballistick Imaging" och optiskt transparenta injektorer, ta fram experimentella data som tidigare inte varit tillgänliga. Abstract: Our goal for this project is to help develop more predictive models for combustion in direct injected engines. The weakest link is a description of the mechanics of liquid breakup near the nozzle of pressure atomized injectors. We will focus on that problem using our new laser technique called ballistic imaging. We will also look inside the nozzle flow passages to characterize the interior flow and correlate that with primary breakup, by developing optically transparent nozzle tips. We will perform these experiments under conditions as close to realistic as the equipment will allow, using the high pressure and temperature spray chamber at Chalmers. The injector to be studied is a specialized diesel injector used in a worldwide collaboration called the Engine Combustion Network (ECN). Our new information will thus couple to a much bigger dataset for the rest of the spray. Unlike the ECN, we will also study the effect of changing fuel types by blending with FAME fuels. To ensure that we are well aligned with theory, we will closely collaborate with Dr. Anders Karlsson at Volvo Technologies.
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