CAJ | 학술논문

在对流槽中对对流边界层(CBL)温度场实验研究的基础上,进一步尝试通过实验技术测量速度场并分析研究CBL中的速度场特征.在应用PIV测量技术时选用铝粉作示踪粒子.实验证明了在混合层中速度分布明显具有对流边界层热泡特性;混合层顶部的速度分布很好地反应出夹卷层的结构特征;湍流速度特征量的垂直分布合理,与野外实测结果和类似的对流槽实验结果接近:误差分析表明示踪粒子的跟随性良好,粒子速度的测量结果能真实地反应流体的运动特征,从而得证了分析结果的可靠性.
재대류조중대대류변계층(CBL)온도장실험연구적기출상,진일보상시통과실험기술측량속도장병분석연구CBL중적속도장특정.재응용PIV측량기술시선용려분작시종입자.실험증명료재혼합층중속도분포명현구유대류변계층열포특성;혼합층정부적속도분포흔호지반응출협권층적결구특정;단류속도특정량적수직분포합리,여야외실측결과화유사적대류조실험결과접근:오차분석표명시종입자적근수성량호,입자속도적측량결과능진실지반응류체적운동특정,종이득증료분석결과적가고성.
Based on the research of the convective boundary layer (CBL) temperature field in a convectivetank, this paper studies the characteristics of the CBL velocity field in the convective tank. Aluminiumpowder (400 order s) is used as a tracer particle in the application of the particle image velocimetry (PIV)technique. The experiment demonstrates: the velocity distribution in the mixed layer clearly possessesthe characteristics of CBL thermals; the velocity distribution in the top zone of the mixed layer showsentrainment layer characteristics; the vertical distribution of turbulent characteristic variables is reasonable,which is similar to field observations and other tank results; the error analysis demonstrates the validityof aluminium powder, which implies the reliability of the results.