本文選題：變角度導流罩 + 連續(xù)性方程　； 參考：《寧波大學》2014年碩士論文

【摘要】：隨著傳統(tǒng)能源日趨枯竭、環(huán)境污染問題惡化,綠色能源開發(fā)迫在眉睫。波浪能作為最理想和最有潛力的綠色能源,如今被世界各國所關注。目前關鍵技術主要為改善波浪能發(fā)電裝置結構以及提高波浪能利用效率。為提高波浪能利用率,擴大波浪能發(fā)電系統(tǒng)的波速利用范圍,提出一種變角度導流罩式海浪發(fā)電裝置,并重點研究裝置聚流效果以及在高流速下保護葉輪不超載工作的性能�；谶B續(xù)性方程和伯努利能量方程,考慮海浪流進入導流罩內部的能量損失,建立口徑比隨外部導流板角度變化關系,在導流罩內部描述海浪流速的動態(tài)變化特性。變角度導流罩裝置相對于定角度導流裝置而言,在海浪流速較高時,對波浪沖擊有柔性的改變�；谒啓C運動相似原理,按照工作相似原則選擇沖擊式葉輪作為變角度導流罩內部核心部件。確定葉輪機械相關參數(shù),分析葉輪機械的運動方式。關于海浪流體在葉輪上的運動,針對沖擊面積的變化值,建立相關速度三角形。分析沖擊海流作用在葉輪上的力矩,得出葉輪的動量矩輸出關系。選擇定槳距恒定波浪發(fā)電機,對裝置在發(fā)電工作時的一些能量損失進行分析,并對發(fā)電裝置在浙江海域III級海浪作用下的輸出功率進行計算。隨著流速進一步增加,常規(guī)導流罩內葉輪出現(xiàn)負荷運轉狀態(tài),變角度導流罩出流口沖擊面積收縮,得出波能利用率隨進口流速的變化關系。最后從導流口長短軸比值、導流罩形狀、初始角度三方面建立相關模型并制造實物進行測試研究。分析不同形狀導流罩對外部流體聚流效果、初始開口角度與最大波能效率值范圍選擇,以及波能利用率差異。
[Abstract]:With the increasingly exhaustion of traditional energy and the deterioration of environmental pollution, the development of green energy is imminent. Wave energy is the most ideal and most potential green energy, which is now being paid attention to by all countries in the world. At present, the key technology is to improve the structure of wave energy generating unit and improve the efficiency of wave energy utilization. In the range of wave speed utilization of large wave energy power generation system, a variable angle guide bell type sea wave power generation device is proposed, and the performance of the device is studied and the performance of the protection of the impeller is not overloaded at high velocity. Based on the continuity equation and the Bernoulli energy equation, the energy loss of the flow into the guide cover is considered, and the caliber is established. Compared with the change of the angle of the external guide plate, the dynamic change characteristic of the wave velocity is described inside the guide hood. The variable angle guide cover is flexible to the wave impact when the wave velocity is higher than the fixed angle guide device. Based on the similarity principle of the turbine motion, the impact impeller is selected according to the working similarity principle. As the inner core component of the variable angle guide cover, the relative parameters of the turbomachinery are determined and the movement mode of the turbomachinery is analyzed. On the motion of the ocean wave fluid on the impeller, the relative velocity triangle is established for the change value of the impact area, and the force moment of the impellers on the impellers is analyzed. The relationship between the momentum moment output of the impeller is obtained. The energy loss of the device in the power generation is analyzed, and the output power of the power generation device under the action of III level waves in the sea area of Zhejiang is calculated. As the flow velocity is further increased, the load running state of the impeller in the conventional guide cover is found, and the impact area of the outlet inlet of the variable angle guide cover is contracted. The relation between the utilization rate of the output wave energy and the change of the inlet velocity. Finally, the correlation model is established from three aspects of the ratio of the long and short axis of the diversion inlet, the shape of the guide cover and the initial angle. The effect of the external fluid accumulation, the selection of the initial opening angle and the maximum wave energy efficiency range, and the wave energy are analyzed. The rate of use is different.

【學位授予單位】：寧波大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM612;P743

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本文編號：1866765