单立管建筑排水系统水力工况的数值模拟研究

Study on numerical simulation of hydraulic regime of single stack drainage system

为了探索建筑排水系统水力工况研究的新途径,以十二层单立管建筑排水系统为计算模型,利用CFD软件FLUENT对单立管建筑排水系统内由于流量变化引起的压力变化进行模拟计算.将模拟结果与实验结果进行对比表明,二维数值模拟计算结果符合排水立管内压力变化规律,模拟排水系统立管内压力变化趋势符合实际工况,实验和数值模拟无论是最大负压值还是最大正压值都很接近.

To explore a new way of the drainage system,this paper used FLUENT which is a software of CFD to do numerical simulation of the pressure changing caused by the flow change in the single stack pipe drainage system.By comparison of numerical simulation calculations and experimental results,two dimension numerical simulation results were corresponding to the variations of pressure discipline in the single draining stack pipes,the simulation of pressure variation tendencies in draining stack pipes accord with the actual conditions.The experiment and numerical simulation were very close both in maximum negative pressure and maximum positive pressure.