Novel insights into the dynamic structure of biodiesel and conventional fuel sprays from high-pressure diesel injectors

Seoksu Moon

Energy, 2016, vol. 115, issue P1, 615-625

Abstract: The spray dynamics of biodiesel has not been thoroughly investigated in previous studies. Understanding the dynamic structure is important for successful modeling of biodiesel sprays and the proper use of biodiesel in modern engines. This study compares the dynamic structure of biodiesel and conventional fuel sprays from single- and multi-hole diesel injectors using a synchrotron X-ray velocimetry technique. Three fuels, biodiesel, diesel and Viscor16br, were used in this study. The results showed that the high viscosity and density of biodiesel decreased the injection velocity compared to conventional fuels. The biodiesel effect on injection velocity was less significant for the multi-hole injector. For the single-hole injector, the biodiesel slowed down the flow breakup and increased the intact core length that caused the lower velocity decay rate and turbulence intensity along the spray center. Meanwhile, in the case of the multi-hole injector, the flow breakup, and the velocity decay rate and turbulence intensity along the spray center appeared equivalent regardless of the fuel. The fuel viscosity did not play a dominant role in the spray dynamics of the multi-hole injector and the dynamic structure of the biodiesel and conventional fuel sprays can be scaled based on the momentum conserving gas jet theory.

Keywords: Biodiesel; Fuel property; Spray dynamics; Diesel injector; Synchrotron X-ray velocimetry (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:115:y:2016:i:p1:p:615-625

DOI: 10.1016/j.energy.2016.09.062

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