CAJ | 학술논문

横向风是造成直接空冷凝汽器迎风侧空冷单元风机进气量降低甚至空气倒灌的主要原因，解决横向风对直接空冷凝汽器的不良影响具有重要意义。该文提出了一种改善横向风对直接空冷凝汽器不良影响的新方法，即在空冷凝汽器的迎风侧挡风墙下方加装导流网。以某1000Mw直接空冷凝汽器的一组典型单元为研究对象，建立几何模型和数学模型，通过计算流体力学（computational fluid dynamics，CFD）模拟分析，阐明了加装导流网以提高风机入口进气流量的机制。研究表明：加装导流网可以有效地减弱空冷凝汽器横向风迎风侧上游单元风机入口的负压，增大进气量，同时避免了加装导流板对下游风机的不利影响。
횡향풍시조성직접공냉응기기영풍측공랭단원풍궤진기량강저심지공기도관적주요원인，해결횡향풍대직접공냉응기기적불량영향구유중요의의。해문제출료일충개선횡향풍대직접공냉응기기불량영향적신방법，즉재공냉응기기적영풍측당풍장하방가장도류망。이모1000Mw직접공냉응기기적일조전형단원위연구대상，건립궤하모형화수학모형，통과계산류체역학（computational fluid dynamics，CFD）모의분석，천명료가장도류망이제고풍궤입구진기류량적궤제。연구표명：가장도류망가이유효지감약공냉응기기횡향풍영풍측상유단원풍궤입구적부압，증대진기량，동시피면료가장도류판대하유풍궤적불리영향。
Prevailing ambient wind is the main reason that causes inlet flow rate decreasing and air flowing backward to the air-cooled condenser fans upward to the wind, so it is very important to improve the detrimental effect of prevailing ambient wind on direct air-cooled condensers （DACC）. On the purpose of this a new method to install a wind guiding net under the windwall was presented. On the bases of geometrically and mathematically modeling to a set of typical units of a 1000MW air-cooled condenser with the wind guiding net installed, the air flow and heat transfer were simulated based on computational fluid mechanics （CFD）, and finally the fan inlet flow rate increasing mechanism was studied and expounded. The simulation study shows that if a set of wind guiding nets are installed, the vacuum under the windward DACC units reduces and the inlet flow rate increases, meanwhile unlike wind guiding plates to be installed, the downstream fans will not be affected.