In order to clarify the effects of width of skirted mixer on flow field

streamwise vorticities

thermal mixing efficiency

total-pressure recovery factor

average speed and speed factor as well as temperature evenness of outlet of mixing diffuser

different widths of skirted mixer were studied quantitatively through the three-dimensional numerical simulations based on Navier-Stokes(N-S) equations

and the principle of effects on aerothermodynamic performance was obtained. Results show that

when width of skirted mixer varies from 40mm to 130mm

stream-wise vorticities increase at the outlet of mixing diffuser with the growing width

and the flow mixing of internal and external bypass can be promoted. Thermal mixing efficiency firstly increases and then decreases as the width increases

and the total-pressure recovery coefficient linearly decreases as the width increases generally. The average speed and speed factor of outlet of mixing diffuser linearly decrease as the width increases

and the temperature evenness of outlet of mixing diffuser increases with the growing width.