叶片进口边位置对快堆二回路钠泵空化性能的影响

为了提升快堆二回路钠泵的空化性能,在确保其他几何参数不变的前提下,将原型样机的叶片进口边分别前伸三次构造出模型泵A、B、C.基于RNG k-ε湍流模型、Zwart-Gerber-Belamri和Schnerr&Sauer空化模型,对各模型泵进行三维定常单相、两相空化数值模拟,预测出各个模型泵的水力性能曲线、不同工况下的空化性能曲线和内流场参数.通过对比原型样机和各个模型泵的水力性能及内流场参数,得到结论:叶片进口边前伸对钠泵的水力性能影响不大,其中模型泵B的水力性能下降量最小;各模型泵的临界空化余量均不同程度降低,模型泵B的空化性能最优;适当地前伸叶片进口边位置,钠泵的空化性能明显提升.

Effect of blade inlet position on cavitation performance of the secondary circuit coolant pump of sodium-cooled fast reactor

In order to improve cavitation performance of SCCP-SFP (the secondary circuit coolant pump of sodium-cooled fast reactor), model pumps A, B and C are constructed respectively by extending the blade inlet edge of the prototype three times on the premise of ensuring that other geometric parameters remain unchanged. Based on the RNG k-ε turbulence model, the Zwart-Gerber-Belamri and Schnerr&Sauer cavitation model, three-dimensional steady numerical simulation for each model pump under single-phase and two-phase cavitation conditions is carried out in this research, and then hydraulic performance curves, cavitation performance curves and internal flow field parameters of each model pump under different working conditions are predicted as well. By comparing the hydraulic performance and internal flow field parameters of the prototype with each model pump, conclusions may be drawn:The blade inlet edge extension has little effect on the hydraulic performance of the sodium pump, and the decline of hydraulic performance of the model pump B is the smallest.The critical cavitation margin for each model pump is reduced in varying degrees, and the cavitation performance of model pump B is the best.By properly extending the inlet edge of the blade, the cavitation performance of the sodium pump is obviously improved.