本文關(guān)鍵詞： 計算流體力學 能源微藻 混合特性參數(shù) 結(jié)構(gòu)優(yōu)化 新型跑道池　出處：《華東理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：跑道池光生物反應器是微藻大規(guī)模培養(yǎng)最常用的裝置。本文利用計算流體力學(CFD)技術(shù)對能源微藻跑道池光生物反應器進行了系統(tǒng)研究,分析了在不同跑道池內(nèi)的流體混合特性參數(shù)如光照方向速度、死區(qū)比例和平均速度等。首先,用CFD對跑道池的蹼輪和跑道池添加內(nèi)構(gòu)件進行了研究：(1)對10米規(guī)模的中型池的蹼輪不同葉片數(shù)量進行優(yōu)化,模擬結(jié)果顯示當蹼輪葉片數(shù)量為6時,跑道池的光照方向速度會高于蹼輪葉片數(shù)為4和8的情況；(2)研究4.5米規(guī)模跑道池蹼輪葉片的傾斜角度的大小對混合的影響,發(fā)現(xiàn)當蹼輪槳葉兩兩之間發(fā)生交錯式傾斜時,跑道池內(nèi)流體的光照方向速度增加、功率下降,而當傾斜角度為15度時,效果達到最佳；(3)為了提高跑道池中流體在光照方向的速度,在2.25米跑道池內(nèi)添加擾流柱進行研究。CFD模擬計算結(jié)果表明該結(jié)構(gòu)能夠明顯地提高跑道池中流體光照方向速度。當跑道池內(nèi)添加5個對角線長30毫米的菱形擾流柱時,將會產(chǎn)生最好的混合效果。其次,對不同規(guī)模的跑道池進行放大研究,發(fā)現(xiàn)跑道池隨著規(guī)模的增大,4.5米規(guī)模和25米規(guī)模的跑道池在光照方向速度上分別比2.25米跑道池降低了41.0%和62.2%。在三種不同規(guī)模跑道池中同時進行微藻培養(yǎng),亦得到了規(guī)模變大產(chǎn)率降低的結(jié)果。最后,應用CFD技術(shù)設(shè)計開發(fā)了一種新型的跑道池,即氣升式跑道池。模擬結(jié)果顯示,帶彎道的氣升式跑道池的光照方向速度要高于2.25米規(guī)模相同表面積的常規(guī)跑道池,這一結(jié)果在微藻熱模培養(yǎng)中得到了驗證。
[Abstract]:Runway pond photobioreactor is the most commonly used device for large-scale microalgae culture. In this paper, the energy microalgae runway photobioreactor was systematically studied by using computational fluid dynamics (CFD) technique. The characteristics of fluid mixing in different runway ponds, such as illumination direction velocity, dead zone ratio and average velocity, are analyzed. Using CFD to study the webbed wheel of the runway pool and the added inner components of the runway pool. (1) optimizing the number of the webbed wheels of a medium scale pond of 10 meters. The simulation results show that when the number of webbed wheels is 6:00, the number of webbed wheels is 6:00. The speed of illumination direction of the runway pool is higher than that of the number of webbed wheel blades of 4 and 8.) the influence of the angle of the fin wheel blade on the mixing is studied. It is found that when the interlaced tilting occurs between the webbed wheel blades, In order to improve the velocity of the fluid in the runway pool in the direction of illumination, the velocity of the fluid in the pool increases and the power decreases, but when the angle of inclination is 15 degrees, the effect reaches the optimum value (3) in order to increase the velocity of the fluid in the runway pool in the direction of illumination, The CFD simulation results show that the flow direction velocity of the fluid in the runway pool can be improved obviously by adding scrambling column into the 2.25m runway pool. When five diamond-shaped spoiler columns with 30 mm diagonal length are added to the runway pool, the flow direction velocity of the fluid in the runway pool can be improved obviously. Will produce the best mixing effect. Second, the study of different sizes of runway pool amplification, It was found that with the increase of scale, the speed of illumination direction of the runway ponds of 4.5m and 25m decreased by 41.0% and 62.2, respectively. The microalgae culture was carried out simultaneously in the three different sizes of runway ponds. Finally, a new type of runway pool, that is, airlift runway pool, is designed and developed by using CFD technology. The simulation results show that, The illumination direction velocity of the airlift runway pool with bends is higher than that of the conventional runway cell with the same surface area of 2.25m. This result has been verified in microalgae thermo-model culture.
【學位授予單位】：華東理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ052

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本文編號：1513520