射流破土挖沟机的喷嘴及喷射参数仿真分析
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摘要
射流破土式挖沟机利用一定压力、流速的水流冲击破坏土体,形成埋设海底电缆和管道所需的沟型,并将其埋设在海底底泥中以防止外界的破坏。挖沟机在海底作业时,喷嘴的配置和喷射参数直接影响着的开沟能力和效率。目前国内对射流式挖沟机喷嘴配置和喷射参数的研究还不够透彻,对这些参数对射流开沟的影响还不够明确。针对提高射流破土挖沟机的海底作业效率,增强挖沟机的开沟能力,本文通过仿真分析研究了不同因素,如射流流速、喷射靶距、间距和喷嘴的角度对射流开沟的深度和宽度的影响。借助本文的分析,在挖沟机实际作业中,根据需要埋设电缆的尺寸以及需要埋设的深度,设置合适的喷射条件和喷嘴角度,可以有效增强挖沟机的开沟能力,提高挖沟机的作业效率。
The jetting trencher destroys the soil by injecting water with high pressure and velocity, forms the trench type needed to bury submarine cable and pipe to prevent them from the destruction outside. When the jetting trencher works on the seabed, the nozzle and jetting parameters directly affect the trenching ability and efficiency. At present, there is a lack of research on nozzle and jetting parameters of jetting trencher in China, and the influence of these parameters on jet trenching is still not clear. In order to improve the working efficiency and enhance the trenching capacity of the jetting trencher, the influence of the different factors, such as the flow rate of the jet, the distance of the jet target, the distance and the angle of the nozzles, on the trenching depth and width are studied in this paper. With the help of the analysis by this paper, in the actual operation of the jetting trencher, according to the cable size and the buried depth, setting the appropriate jetting conditions and nozzle angle can effectively enhance the trenching capacity of the jetting trencher and improve its efficiency.
The jetting trencher destroys the soil by injecting water with high pressure and velocity, forms the trench type needed to bury submarine cable and pipe to prevent them from the destruction outside. When the jetting trencher works on the seabed, the nozzle and jetting parameters directly affect the trenching ability and efficiency. At present, there is a lack of research on nozzle and jetting parameters of jetting trencher in China, and the influence of these parameters on jet trenching is still not clear. In order to improve the working efficiency and enhance the trenching capacity of the jetting trencher, the influence of the different factors, such as the flow rate of the jet, the distance of the jet target, the distance and the angle of the nozzles, on the trenching depth and width are studied in this paper. With the help of the analysis by this paper, in the actual operation of the jetting trencher, according to the cable size and the buried depth, setting the appropriate jetting conditions and nozzle angle can effectively enhance the trenching capacity of the jetting trencher and improve its efficiency.
引文
[1]高溦.水力冲射海底开沟机的参数优化[D].大连:大连理工大学,2008
[2]张海朋.海底水力冲射开沟作业数值计算[D].哈尔滨:东北石油大学,2016
[3]唐立志.适用于硬质黏土的淹没射流物理模型[J].油气储运,2016,35(4):432-438
[4]奉虎,王艳涛,杜喜军,等.挖沟机喷嘴射流流场的数值模拟[J].中国海洋平台,2016,31(1):50-54
[5]王喆,袁庆晴,马洪新,等.射流式挖沟机沟内流场数值计算与分析[J].哈尔滨工程大学学报,2015(3):292-296
[6]李振升,倪福生,顾磊,等.双喷嘴射流冲坑的几何相似性研究[J].机械设计与制造工程,2016,45(1):82-85
[2]张海朋.海底水力冲射开沟作业数值计算[D].哈尔滨:东北石油大学,2016
[3]唐立志.适用于硬质黏土的淹没射流物理模型[J].油气储运,2016,35(4):432-438
[4]奉虎,王艳涛,杜喜军,等.挖沟机喷嘴射流流场的数值模拟[J].中国海洋平台,2016,31(1):50-54
[5]王喆,袁庆晴,马洪新,等.射流式挖沟机沟内流场数值计算与分析[J].哈尔滨工程大学学报,2015(3):292-296
[6]李振升,倪福生,顾磊,等.双喷嘴射流冲坑的几何相似性研究[J].机械设计与制造工程,2016,45(1):82-85