高压射流破冰仿真研究
Simulation Study of Ice Breaking by High Pressure Jet
李少峰 1马铁强 1单光坤 1于洲1
作者信息
- 1. 沈阳工业大学机械工程学院,辽宁 沈阳 110870
- 折叠
摘要
风力发电技术领域中风机覆冰已成为制约风电机组安全运营的重大隐患.为研究连续高压射流对冰层的冲击破碎,将该过程简化为细长圆柱,对有限大的冰块冲击破碎的过程,基于SPH方法建立高压射流破碎冰层有限元模型,观察射流撞击冰块发生失效破碎时冰块的碎裂程度.模拟了随时间变化的应力波演化以及与之相对应的冰层破坏效果.分析了不同射流速度、射流角度以及喷嘴口径对射流碎冰程度的影响,并为满足高效、节能的除冰方法选择射流速度为80m/s、射流角度为75°、喷嘴口径为2 mm的射流方式.
Abstract
Ice cover of wind turbine in wind power generation technology has become a major hidden danger that restricts the safe operation of wind turbines.In order to study the impact of continuous high-pressure jet on ice crushing,the process is simplified to be an elongated cylinder,which impacts and crushes a finite amount of ice,and a finite element model of high-pressure jet crushing ice is established based on the SPH method,which is used to observe the degree of fragmentation of ice when the jet impacts the ice to fail and crushes the ice.The time-dependent stress wave evolution and the corresponding ice sheet destruction effect diagram are simulated.The effects of different jet speeds,jet angles and nozzle calibres on the degree of jet ice fragmentation are analysed,and a jet speed of 80 m/s,a jet angle of 75° and a nozzle calibre of 2 mm are selected to meet the requirements of an efficient and energy-saving de-icing method.
关键词
高压射流/SPH/数值模拟/应力波/碎冰程度Key words
high-pressure jet/SPH/numerical simulation/stress wave/degree of ice fragmentation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据