Impeller marginal line matching method and device

Abstract

The invention relates to an impeller marginal line matching method and device. The impeller marginal line matching method comprises the following steps of: obtaining on-way speed distribution of a fluid flowing from an upstream guide vane to a downstream guide vane through a speed pre-obtaining model; determining a circumferential total offset distance of the fluid flowing the tail edge of the upstream guide vane to the front edge of the downstream guide value according to the on-way speed distribution; and obtaining an optimal time sequence position of the front edge of the downstream guide vane relative to the tail edge of the upstream guide value according to the circumferential total offset distance. According to the impeller marginal line matching method, optimal time sequence positions of impellers can be simply and rapidly searched, so that the process of carrying out analog calculation through numerical software is avoided, the calculation time and calculation resources can besaved, and the design efficiency can be improved.

Description

Technical field [0001] The invention relates to the technical field of impeller design, in particular to a method and device for matching the edge line of an impeller. Background technique [0002] The aerodynamic design of turbomachines generally pursues high aerodynamic performance, and with the development of design methods, more and more limitations of steady design appear. The internal flow field of the turbomachine is inherently highly unsteady, and fully exploiting the aerodynamic benefits brought by the unsteady effect is a new breakthrough. Utilizing the unsteady effect of the flow field by arranging the timing position of the impeller can further improve the isentropic efficiency of the impeller. [0003] Different timing positions have different effects on the isentropic efficiency of the turbine, and there is an optimal timing position. In order to find the optimal timing position, the optimal timing position of the impeller can be obtained by simulating the different...

AI Technical Summary

Problems solved by technology

The above-mentioned first method will encounter the following problems in the process of finding the optimal timing position: 1. The current unsteady calculation may involve the blade reduction problem, and the process is cumbersome; 2. The unsteady calculation of multiple calculation examples requires computer resources. Higher; 3. Repeated iterations of numerical simulation are likely to cause long calculation cycles

Compared with the first method, the second method above reduces a lot of time and resource consumption, but it is still inevitable to use numerical simulation and consume computing resources

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