双层悬栅消力池的水力特性数值模拟

针对物理模型试验难以得到详细的流速、压强等水力参数数据问题,利用流体力学软件FLUENT建立RNG k-ε双方程紊流模型进行数值模拟,得到消力池内最大水深、流态、流速以及压强等水力参数,通过数学模型计算值与物理模型试验值对比分析以及数值模拟计算值之间对比分析,结果表明:数学模型计算值与物理模型试验值吻合较好,且布置双层悬栅时,计算值与试验值误差较小;双层悬栅使水流产生漩涡的能力较强,从而使水流对护坦冲击较小,护坦处涌浪降低,对压强变化影响较大,说明双层悬栅具有更好的消波稳流作用。

Numerical simulation for hydraul ic characteristics of double suspended grid in the stilling basin

Thr ough phy sical mo del ex periment, it is hard to g et det ailed hydraulic parameter data such as v elocit y, pr essure, et c.To co pe, the paper uses fluid dynamics softw are FLUENT to set up RNG k- Edo uble2equat ion turbulence model to make nu2mer ical simulatio n, so as to get hydraulic parameters such as max imal wat er depth, flow pattern, v elo city and pr essure, etc. Thenmakes analy sis of compar ison betw een mathemat ical model calculated value and physical mo del ex per iment al value, and makes a2nalysis of compar ison among numerical model calculated values. T he result show s the mathemat ical mo del calculated value andphy sical model ex per imental v alue are r oughly ident ical, and the er ro r between calculated value and experimental value is smallwhen double suspended gr id is arr ang ed. The double suspended gr id has stro ng capacity t o make curr ent g enerate sw irl, hencesmall impact o n a pr on slab by cur rent, and lower ed surg e at the apr on slab, lar ger effect on