非恒定流精确复演方法研究

Research of the precise simulation of unsteady flow

研究了水工水力学模型试验中影响非恒定流复演 (生成)精确性的原因,指出了精确性不理想的主要原因是其控制方法适用性不好.根据这一结论,给出了两种精确的非恒定水流的复演方法:一种是数字流量堰非恒定流复演方法,它通过改变堰板高度来调节流量,无需调节量水堰水位;另一种是流量元水流装置,它通过组合流量不同的流量元来调节流量. 这两种非恒定水流的复演都是采用开环控制方法.

Basis of the study on causation of the precision of unsteady flow simulation(generation)method in model test,it is proposed that the causation of dissatisfactory in the precision is inaptitude of the control method.The paper provides two precise method of unsteady flow simulation.The one is digital-weir,it changes flow by adjusting the high of weir's shutter,doesn't adjusting water level.The other one is flow-unit,it changes flow by compounding flow units.The two precise method of unsteady flow simulation make use of open-loop control method.