Heat Release Tests and High-Speed Photography using a High Swirl Bomb Simulating the Combustion Process in the D.I. Diesel Engine 861274

A unique high swirl bomb (max. swirl rate of 22,000 rev/min.) has been constructed to simulate conditions in the small direct injection Diesel engine with direct and positive control of pressure, temperature and injection rate. The bomb is equipped with 3 alternative heads as follows:
  1. a)
    an anemometer head for pre injection velocity surveys
  2. b)
    an instrumented head for heat release tests
  3. c)
    a photography head.
In mode b) the bomb operates with a high speed data acquisition system and in mode c) with a 8000 frame per second camera. An extensive series of heat release and photogr^hy tests has been performed and the paper summarises these results.


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