The flow rate and mixing characteristics of splash platelet injector element with a typical triangular lumen were experimentally investigated by using a collecting device with an area of 16cm×16cm.The effect of main configuration parameters

such as expending angle and relative thickness

on flow coefficient and mixing efficiency factor were obtained.The results show that

flow coefficient and mixing efficiency factor increase firstly and then decrease with the increase of expending angle.Both of them could reach their maximum value of 0.773 and 82.6% when expending angle is at the range of 60° to 75°.It is also found that the relative thickness has great influence on the flow coefficient and mixing efficiency.