The injection and mixing of liquid fuel ejected from alternating wedge strut had been studied. Results show the feature of break up and mixing. However, in order to compare the mixing characteristics of different geometric struts and find the optimal strategy, more works need to be done. Therefore experimental and computational studies of ordinary strut, compression ramp strut and alternating wedge strut have been developed in this paper. The data of flow field structure and total pressure loss will be compared. On this basis, a new strut is designed and some computational works have been finished. In the experiments, schlieren photograph and PLIF are used to take photos. In the computations, fluent software helps researchers to obtain other parameters. The results of this paper indicated that the penetration of three struts had a few differences. But alternating wedge strut and compression ramp strut improved the distribution of fuel. When injected with low pressure, compression ramp strut had the shortest mixing length and the maximum total pressure loss. The improved AW strut promoted mixing and reduced the total pressure loss slightly.
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