Applicability of blended blade and endwall under different operating conditions

To continue the previous work, NASA rotor 67 redesigned with blended blade and endwall (BBEW) was further studied and focused on assessing the influences of three different rotating speeds, i. e. 100%, 90% and 80% of full speed, at two different Reynolds numbers, under ground condition and 10000-meter high altitude condition. Numerical tests show that under almost all the operating conditions in relation to original model, BBEW model can improve performance such as total pressure ratio and isentropic efficiency, particularly under conditions of low rotating speeds and low Reynolds numbers, with the efficiency up by 0.6% to 0.8%. This indicates that BBEW has broad applications under operating conditions, serving as another important aspect of full 3-D blade in addition to sweep and bow techniques.