CAJ | 학술논문

采用三维标准k-ε紊流数学模型,引入气液两相流体积率模型跟踪自由水面,对建有高桩码头的河道流场进行数值模拟,并从流速分布和水位变化两方面对数值模拟和物理模型试验结果进行对比分析,验证了数学模型的可靠性和合理性.分析结果表明:高桩码头桩群对过水断面有"束窄"作用,桩群区外的流速急剧增大;水流进入桩群区一定距离后,存在一个速度的极小区域,在桩群影响远区,其流速沿程增大;当桩群长度一定时,桩群宽度越大,其阻水作用越大;当桩群宽度一定时,桩群长度越大,其阻水越明显.
채용삼유표준k-ε문류수학모형,인입기액량상류체적솔모형근종자유수면,대건유고장마두적하도류장진행수치모의,병종류속분포화수위변화량방면대수치모의화물리모형시험결과진행대비분석,험증료수학모형적가고성화합이성.분석결과표명:고장마두장군대과수단면유"속착"작용,장군구외적류속급극증대;수류진입장군구일정거리후,존재일개속도적겁소구역,재장군영향원구,기류속연정증대;당장군장도일정시,장군관도월대,기조수작용월대;당장군관도일정시,장군장도월대,기조수월명현.
The flow field affected by tall piled wharf was simulated numerically by means of 3D standard k-e turbulence model. The moving free surface was tracked by the fractional volume of fluid model for water-air two-phase flow. The measured results of flow field and water level validated the reliability of the numerical model and method. The analyzed results show that the water-carrying section becomes less when passed the piles group and the flow velocities become higher sharply out of the piles group. After water flow out of the piles group, there is an area of extremely small flow velocities and then the velocities will be increased along the flow direction. Under the condition that with the same length of piles group, the larger the width of piles group is, the more the blocking effect will be. Under the condition that with the same width of piles group, the more the length of piles group is, the more obviously the water level will be run up.