农业工程学报
農業工程學報
농업공정학보
2014年
24期
232-239
,共8页
李娇%张秀梅%关长涛%郑延璇%黄滨%崔勇
李嬌%張秀梅%關長濤%鄭延璇%黃濱%崔勇
리교%장수매%관장도%정연선%황빈%최용
水产养殖%水流%试验%图像粒子测速%上升流特性%镂空方型增殖礁
水產養殖%水流%試驗%圖像粒子測速%上升流特性%鏤空方型增殖礁
수산양식%수류%시험%도상입자측속%상승류특성%루공방형증식초
aquaculture%flow of water%experiment%particle image velocimetry%characteristics of upwelling%hollow square enhancement reefs
利用粒子图像测速技术(particle image velocimetry)对镂空方型增殖礁单体礁和组合礁的上升流流场特性进行分析,按照海区实测流速和礁区选址要求,设定5个不同的来流速度0.2、0.4、0.6、0.8、1.0 m/s,并计算出试验流速分别为0.045、0.090、0.135、0.180、0.225 m/s。结果表明:单体礁在任何一种迎流方式下,上升流的规模都随来流速度的增加而增大;而相同来流速度下,主视面90o迎流时,上升流规模最大;单体俯视面45o迎流时,上升流规模最小;礁体横向组合排列时,礁体间距在0.5L~1.0 L时所产生的上升流规模最大,礁体间的协同作用最强;礁体纵向组合排列时,在0.5L~1.5 L倍的间距时,礁体间的相互作用较强,形成的上升流规模最大。
利用粒子圖像測速技術(particle image velocimetry)對鏤空方型增殖礁單體礁和組閤礁的上升流流場特性進行分析,按照海區實測流速和礁區選阯要求,設定5箇不同的來流速度0.2、0.4、0.6、0.8、1.0 m/s,併計算齣試驗流速分彆為0.045、0.090、0.135、0.180、0.225 m/s。結果錶明:單體礁在任何一種迎流方式下,上升流的規模都隨來流速度的增加而增大;而相同來流速度下,主視麵90o迎流時,上升流規模最大;單體俯視麵45o迎流時,上升流規模最小;礁體橫嚮組閤排列時,礁體間距在0.5L~1.0 L時所產生的上升流規模最大,礁體間的協同作用最彊;礁體縱嚮組閤排列時,在0.5L~1.5 L倍的間距時,礁體間的相互作用較彊,形成的上升流規模最大。
이용입자도상측속기술(particle image velocimetry)대루공방형증식초단체초화조합초적상승류류장특성진행분석,안조해구실측류속화초구선지요구,설정5개불동적래류속도0.2、0.4、0.6、0.8、1.0 m/s,병계산출시험류속분별위0.045、0.090、0.135、0.180、0.225 m/s。결과표명:단체초재임하일충영류방식하,상승류적규모도수래류속도적증가이증대;이상동래류속도하,주시면90o영류시,상승류규모최대;단체부시면45o영류시,상승류규모최소;초체횡향조합배렬시,초체간거재0.5L~1.0 L시소산생적상승류규모최대,초체간적협동작용최강;초체종향조합배렬시,재0.5L~1.5 L배적간거시,초체간적상호작용교강,형성적상승류규모최대。
Based on particle image velocimetry (PIV), the upwelling characteristics of hollow square enhancement reefs was researched, including the upwelling scale of a single reef under different flow velocity, the influence of reef deployment to upwelling, and the upwelling change with different arrangements of reefs. The real size of the reef was 800 mm in length, 800 mm of height 400 mm in width, and a hole in the reef was 200 mm in length, 200 mm in height, and the thickness of the reef was 40 mm. The real flow velocity (0.2, 0.4, 0.6, 0.8 and 1.0 m/s) and depth of the ocean were measured, According to the similarity principle, the experiment velocities were 0.045, 0.090, 0.135, 0.180, and 0.225 m/s. The experiment results indicated:when the deployment of a single reef is the same, the scale of upwelling became strong as the flow velocity increased. Under the same velocity, the upwelling scale of the main surface against the flow was the largest, the velocity maximum of the upwelling was 62%of flow velocity. The velocity maximum of the upwelling of the side surface and top surface with 90° against the flow was between 30%and 40%of the flow velocity. The upwelling scale of the top surface with 45° against the flow was the smallest, and the velocity maximum of the upwelling was only 14 percent of the flow velocity. Analysis showed that the deployment of the reef had an important effect on upwelling characteristics. As area against the flow became larger, the upwelling scale became apparently stronger. Under the same velocity, the ratio between the upwelling height and reef height of the top surface with 90° against the flow was higher than the others, which did not have a direct proportion with the reef height, and in order to measure the stability of the reefs, the deployment of the top surface with 90° against the flow was chosen, which arrangement of different distance was researched. When the distance between the reefs arranged horizontally was 0.5L, the area and height of the upwelling was the largest. When the distance between the reefs arranged horizontally was 1.0L, the velocity maximum of the upwelling was obtained. When distance between reefs arranged horizontally is 2.0L, upwelling area is smaller than single reef ’s. When the distance between the reefs arranged horizontally was 1.5-2.0L, the upwelling height was smaller than a single reef ’s. So when the distance between the reefs arranged horizontally was from 0.5L to 1.0L, the interaction of reefs was strong, and the scale of the upwelling became larger. When the distance between the reefs arranged longitudinally was 1.0L, the velocity maximum of the upwelling was obtained. When the distance between the reefs arranged longitudinally was from 0.5L to 1.5L, the area and height of the upwelling was larger than the single reef’s. So when the distance between the reefs arranged longitudinally was from 0.5L to 1.5L, the interaction of the reefs was the largest. According to the experiment’s result, the configuration of the reefs was designed, every unit was constituted by 100 reef, the reef was deployed as a top surface with 90° against the flow, and the distance between the reefs arranged horizontally with flow was 1.0L, and the distance between the reefs arranged longitudinally with flow 1.5L.