论文部分内容阅读
实现水力驱动运行对提升海水淡化能量回收装置控制灵活性和工作可靠性具有重要意义。基于FLUENT软件,建立了转子式能量回收装置水力驱动运行流固耦合模型,在操作压力6.0 MPa及高、低压入口流速5.0 m/s条件下,分析了装置启动运行时转速响应特性和高、低压流体流动速度变化规律。结果表明,转子转速呈先快速增长后趋于平稳的发展趋势,且在1.25 s的启动时间内,装置理论转速可达1 395 r/min;装置高压区和低压区内,端盘楔形结构对应的转子孔道内流体始终存在切向速度差,其是驱动装置水力转动的主要动力。
Achieving hydraulically-driven operation is of great importance to improve control flexibility and operational reliability of desalination energy recovery plants. Based on FLUENT software, the fluid-structure interaction model of rotor-driven energy recovery unit was established. Under the condition of operating pressure of 6.0 MPa and inlet velocity of 5.0 m / s at high and low pressure, the response characteristics of speed and high and low pressure Fluid flow rate changes. The results show that the rotor speed tends to increase rapidly and then tends to be steady. In the starting time of 1.25 s, the theoretical rotational speed of the device can reach 1 395 r / min. In the high-pressure zone and the low-pressure zone, the wedge- Of the fluid in the rotor bore always has a difference in tangential velocity, which is the main driving force for the hydraulic turning of the drive.