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Çѱ¹¼öÀÚ¿øÇÐȸ / v.38, no.8, 2005³â, pp.631-643
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( Hydraulic and Numerical Model Experiments of Flows in Circulation-Water-Pump Chambers ) |
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½Å¼³µÉ º¹ÇÕȷ¹ßÀü¼Ò Ãë¼öÆßÇÁÀå °èȹ¾È¿¡ ´ëÇÏ¿© ¼öÄ¡ ¹× ¼ö¸®¸ðÇü½ÇÇèÀ» ¼öÇàÇÏ°í ¼øÈ¯¼öÃë¼öÆßÇÁ¿î¿µ¿¡ ¹®Á¦¸¦ ¹ß»ý½Ãų °¡´É¼ºÀÌ ¹ß°ßµÇ¸é °³¼±¾ÈÀ» µµÃâÇÏ´Â °ÍÀÌ º» ¿¬±¸ÀÇ ¸ñÀûÀÌ´Ù. ¼ö¸®¸ðÇüÀº 1:20ÀÇ Å©±â·Î ¾ÆÅ©¸±À» ÀÌ¿ëÇÏ¿© Á¦À۵Ǿú°í 2Â÷¿ø ¼öÄ¡¸ðÇü½ÇÇèÀº RMA2¸ðÇüÀ» ÀÌ¿ëÇÏ¿´´Ù. ¼ö¸® ¹× ¼öÄ¡¸ðÇü½ÇÇèÀÇ °á°ú¸¦ Æò°¡Çϱâ À§ÇÏ¿© Ãë¼ö·Î ¹× Ãë¼öÆßÇÁÀå³» È帧¿¡ ´ëÇÑ Æò°¡±âÁØÀ» ¼³Á¤ÇÏ¿´´Ù. º¹ÇÕȷ¹ßÀü¼Ò Ãë¼öÆßÇÁÀåÀÇ °èȹ¾È¿¡ ´ëÇÑ 2Â÷¿ø ¼öÄ¡¸ðÇü½ÇÇèÀ» ÅëÇÏ¿© ¾ò¾îÁø ¿¬Á÷¹æÇ⠿͵µ¸¦ ¼ö¸®¸ðÇü½ÇÇè°á°ú¿Í ºñ±³ÇÏ¿© È帧Æò°¡±âÁØÀÇ ÇϳªÀÎ ¿Í·ù¹ß»ý °¡´É¼ºÀ» Æò°¡ÇÏ¿´´Ù. °èȹ¾ÈÀº Ãë¼öÆßÇÁÀå³»¿¡¼ Å« ±Ô¸ðÀÇ ¿Í·ù°¡ ¹ß»ýÇÏ¿© ¼øÈ¯¼öÃë¼öÆßÇÁ¿î¿µ¿¡ ¹®Á¦¸¦ ¹ß»ý½Ãų ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÇ¾ú´Ù. ÀÌ¿¡ µû¶ó¼ 9°³ °³¼±¾ÈÀÌ °í¾ÈµÇ¾î ¼öÄ¡¸ðÀǵǾú´Ù. 9°³Áß 4°³ÀÇ °³¼±¾È¿¡ ´ëÇÏ¿© ¼ö¸®¸ðÇü½ÇÇèÀÌ ¼öÇàµÇ¾ú´Ù. ¼ö¸®¸ðÇü½ÇÇè¿¡ ±Ù°ÅÇÏ¿© 4°³ÀÇ °³¼±¾ÈÀÇ Çϳª°¡ ÃÖÁ¾°³¼±¾ÈÀ¸·Î Á¦½ÃµÇ¾ú´Ù. °ø°£ÀûÀÎ Á¦¾àÁ¶°ÇÀÌ ÀÖ´Â ¼øÈ¯¼öÃë¼öÆßÇÁÀå ¹× Ãë¼ö·Î ¼³°èÀÇ °æ¿ì °Ýº®°ú µµ·ùº®À» ÀÌ¿ëÇÏ¸é ¼øÈ¯¼öÃë¼öÆßÇÁÀåÀÇ È帧»óȲÀ» °³¼±ÇÒ ¼ö ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. |
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The objective of this study is to perform hydraulic and numerical model experiments of the flows in circulation-water-pump(CWP) chambers of combined cycle power plants (CCPP) to be built and to suggest improvement plans if the flows might cause a serious problem on the operation of CWPs. Hydraulic model was constructed in a scale of 1 to 20 using acrylic sheets and a two dimensional numerical model used was RMA2. To evaluate results of Hydraulic and numerical model experiments, evaluation criteria of flow conditions in the intake canal and CWP chambers were determined. Vertical vorticities obtained from numerical simulations for the initial plan of CCPPs were qualitatively compared with results of hydraulic model experiments and the formation possibility of a large scale vortex, one of the flow evaluation criteria, was evaluated. The initial plan was found not to satisfy the flow evaluation. Nine improvement plans were devised and numerically simulated. Four alternative plans among nine improvement plans were selected and hydraulically experimented. On the ground of the results of hydraulic model experiments, a final improvement plan, one of four improvement plants, was suggested. When CWP chambers and intake canals were designed with spatial constraints, flow separating wall and guide walls were found to improve flow conditions in CWP chambers. |
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Ű¿öµå |
¼øÈ¯¼ö Ãë¼öÆßÇÁ;Ãë¼ö·Î;¼ö¸®¸ðÇü;¿Íµµ;circulation water pump;hydraulic model;intake canal;RMA2;vorticities; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.38, no.8, 2005³â, pp.631-643
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200531234557707)
¾ð¾î : Çѱ¹¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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