Atomization characteristics experiment of impinging jets with power-law fluid
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(1.Combustion Engineering Research Institute, Harbin Institute of Technology, Harbin 150001,China; 2. Aero Engine Corporation of China, Commercial Aircraft Engine Co.,Ltd, Shanghai 200241,China )

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V434

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    Abstract:

    On the impinging injector platform, the effects of jet asymmetry, airflow disturbances and metal particles on the atomization characteristics were studied by PIV (particle image velocimetry) technology. The experimental results indicate that when the two asymmetric jets impinges at low weber number, the chain sheet appears, and as the eccentricity increases, the link-length decreases. Fish bones regime can be found when the jet is with different length. Additional airflow disturbances can increase the atomization quality, because when the surface wave's intensity is increased, it will break up more easily, as a result, the width of fluid sheet and the SMD (sauter mean diameter) of droplets decrease. When power-law fluid contains aluminum particles, its strength is smaller and its max length decreases obviously. The droplets' SMD convergence does not change, as well, the SMD reaches convergence in shorter time. In conclusion, proper jet asymmetry, airflow disturbances and metal particles can improve impinging jets' atomization performance with power-law fluid.

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History
  • Received:March 01,2017
  • Revised:
  • Adopted:
  • Online: June 24,2018
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