Application of Refractive Index Matching to a Diesel Nozzle Internal Flow,
Abstract
An enlarged acrylic model of a production diesel fuel injection nozzle was incorporated into a steady flow rig to allow flow velocity measurements to be obtained by laser Doppler velocimetry in critical areas of the nozzle. Optical access into the complicated, internal flow passages was achieved by using, instead of gas oil, a mixture of hydrocarbon fuels which at a given mixture ratio, temperature and laser wavelength match the refractive index of the acrylic nozzle body. This matching has made possible the quantitative characterisation of the nozzle internal flow, in terms of spatially-resolved, three-dimensional mean velocity and turbulent components, and the validation of computer models aiming to predict the flow and cavitation in fuel injection systems. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 23, 1992
- Accession Number
- ADP008942
Entities
People
- C. Arcoumanis
- J. M. Nouri
- R. J. Andrews
Organizations
- Imperial College London