CAJ | 학술논문

为给大管径排水管渠清淤系统设计提供相应的参数，采用有机玻璃制作排水管渠模型，以沙粒模拟代表性淤积物，利用2D - PIV 系统对螺旋桨搅拌的机械清淤参数进行了试验研究。对不同粒径沙粒在螺旋桨搅拌作用下起动和完全悬浮两种状态时的流场情况进行了考察，探讨了机械搅拌作用下的水流状态对沙粒的作用效果和规律。试验证实机械搅拌的清淤技术思路可行，起动和悬浮沙粒的粒径可由螺旋桨转速来控制，同时，加大螺旋桨转速可有效增强搅拌冲刷的强度和效果。
위급대관경배수관거청어계통설계제공상응적삼수，채용유궤파리제작배수관거모형，이사립모의대표성어적물，이용2D - PIV 계통대라선장교반적궤계청어삼수진행료시험연구。대불동립경사립재라선장교반작용하기동화완전현부량충상태시적류장정황진행료고찰，탐토료궤계교반작용하적수류상태대사립적작용효과화규률。시험증실궤계교반적청어기술사로가행，기동화현부사립적립경가유라선장전속래공제，동시，가대라선장전속가유효증강교반충쇄적강도화효과。
To provide the correlative parameter for the design of mechanical dredging system of large draining pipe - canal,a plexiglass draining model test using the propeller mixer was conducted,in which the sand particle was adopted as representative deposit,and 2D - PIV system was used as the measuring device. Through the test,the flow - field in two cases was studied, namely the incipient motion and suspension of different size particles that were stirred by propeller. The effect and law of interac-tion between flow state and sand particle under mechanical stir is discussed. The model test verifies the applicability of dredging by mechanical mixing,in which the size of incipient and suspension particles could be controlled by rotating speed of propeller, so it is applicable to strengthen the dredging effect by boosting the propeller speed.