Parametric Testing of Chevrons on Single Flow Hot Jets

摘要: Summary A parametric family of chevron nozzles have been studied, looking for relationships between geometric parameters, flow characteristics, and far-field noise. Both cold hot conditions run at acoustic Mach number 0.9. Ten models tested, varying count, penetration, length, symmetry. Four comparative studies were defined from these datasets which show: that length is not a major impact on either or sound; penetration increases noise high frequency lowers it low frequency, especially counts; count strong player with good reductions being achieved without penalty; asymmetry slightly reduces the chevron. Finally, shown although jets differ systematically one, overall trends parameters same. Nomenclature D baseline nozzle diameter