CAJ | 학술논문

　　针对传统跑道池容易出现藻液分层和微藻培养密度低等不足，本文提出了一种具有同时增加表面积体积比和导流作用的透明V形导流槽，并采用CFD模拟了导流槽的V形倾斜角、藻液深度和进气速度对反应器内速度场分布的影响。结果表明：通过导流槽下表面的导流作用，气升混合所影响的范围被扩大到两侧池壁附近的流域，在竖直方向形成了比较均匀的上下层之间的流场循环。从而改善了藻液的混合以及光照条件，也增加了CO2在藻液中的停留时间。优化后的V形导流槽的倾斜率为0.1，藻液深度为0.3 m，进气速度为0.1 m/s。在优化条件下，速度场的分布比较均匀，平均速度适中，有利于防止微藻附壁生长和沉淀，能量消耗也相对较小。
　　침대전통포도지용역출현조액분층화미조배양밀도저등불족，본문제출료일충구유동시증가표면적체적비화도류작용적투명V형도류조，병채용CFD모의료도류조적V형경사각、조액심도화진기속도대반응기내속도장분포적영향。결과표명：통과도류조하표면적도류작용，기승혼합소영향적범위피확대도량측지벽부근적류역，재수직방향형성료비교균균적상하층지간적류장순배。종이개선료조액적혼합이급광조조건，야증가료CO2재조액중적정류시간。우화후적V형도류조적경사솔위0.1，조액심도위0.3 m，진기속도위0.1 m/s。재우화조건하，속도장적분포비교균균，평균속도괄중，유리우방지미조부벽생장화침정，능량소모야상대교소。
Aiming at the drawbacks with algae solution stratify and low density algae cells in the traditional raceway pond,this research designed a V-shape transparent flow guide groove to increase the surface-to-volume ratio and guide the flow,and simulated the influence on the velocity field distribution by the surface gradient of groove,solution depths and air inlet velocity using CFD method. The results showed that in the presence of airlift with the flow guided groove,the mixing area was expanded to the areas near lateral zones on both sides of the raceway pond,and formed a vertical flow cycle between the adjacent layers. The mixing and lighting conditions of the microalgae solution were improved,and the residence time of the carbon dioxide in the solution was also increased. The optimal design parameters were tanq=0.1,d=0.3 m,vair?in=0.1 m/s. Under the optimal conditions,the velocity field distributed evenly,and the mean velocity was suitable for preventing the wall attachment effects and sediment of the algae. In addition,the equipment energy consumption was relatively low.