Droplet-Wall/Film Impact in IC Engine Applications

Abstract

Fuels sprayed inside IC-engines can impact the internal surfaces and thus obviates the purpose of atomization. Furthermore, the subsequent film gasification also constitutes a completely different mode of fuel gasification that could fundamentally affect the fuel/air mixing and combustion processes. The accumulation and growth of the film depends on the outcome of subsequent drop impact on the initially formed film, and as such controlling the outcome of the impact is critical for engine operation. In our recent study (Tang, et al., Soft Matter 2016), we presented a regime diagram based on the Weber number We (ratio of impact inertia and surface tension) and the film thickness, delineating the bouncing and merging operating conditions and providing scaling for the transition boundaries of a single liquid (C14 alkane).

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Document Details

Document Type
Technical Report
Publication Date
Aug 14, 2017
Accession Number
AD1051275

Entities

People

  • Chung K. Law

Organizations

  • Princeton University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alkanes
  • Boundaries
  • Boundary Layer
  • Capillarity
  • Capillary Waves
  • Diameters
  • Dynamics
  • Electronic Mail
  • Energy
  • Engines
  • Films
  • Internal Combustion Engines
  • Kinetic Energy
  • Surface Energy
  • Surface Tension
  • Thick Films
  • Thin Films

Readers

  • Combustion and Flow Dynamics.
  • Petroleum Engineering
  • Systems Analysis and Design