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Çѱ¹¼öÀÚ¿øÇÐȸ / v.38, no.5, 2005³â, pp.365-377
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¼ö·ÂÅͺó µå·¡ÇÁÆ®°üÀ» Åë°úÇÏ´Â ¹°°í±â¿¡ ¹ÌÄ¡´Â ³·ùÀÇ ¿µÇâ ¼öÄ¡¸ðÀÇ
( Numerical Investgation of the Effect of Turbulent Flow on Fish Passing through Hydroturbine Draft Tube ) |
¹éÁßö; Á¶Áö¾Æ°ø´ë Åä¸ñȯ°æ°øÇаú;
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º» ¿¬±¸´Â ¼ö·Â¹ßÀü½Ã¼³¿¡¼ ¹°°í±âÀÇ »ýÁ¸°ú »óÇØ¸¦ À¯µµÇÏ´Â È帧Çö»óÀ» ÆÄ¾ÇÇϱâ À§ÇÑ Áøº¸µÈ ¼öÄ¡ÇØ¼®±â¹ýÀÇ °³¹ßÀ» ´Ù·ç°í ÀÖ´Ù. ¿øÇü Á©ÀÇ LES¸¦ ½Ç½ÃÇÏ¿© ³·ùÁ©ÀÇ Àü´ÜÁö¿ª¿¡ ¹°°í±â¸¦ ¹æ·ùÇÏ´Â ½ÇÇèÀÇ °á°ú¸¦ ¼öÄ¡ÀûÀ¸·Î ÇØ¼®ÇÏ¿´´Ù. ÀÌ ¿¬±¸¿¡¼´Â ¼ø°£ LES È帧ÀåÀÌ À¯¼Ó, ¾Ð·Â ±×¸®°í ¿ÍµµÀÇ °ÇÑ º¯µ¿À¸·Î Ư¼ºÁö¿ï ¼ö ÀÖÀ¸¸ç, À̰ÍÀÌ ¹°°í±â¿¡°Ô ½Ã°£Æò±Õ Á¤»ó·ùº¸´Ù »ó´çÈ÷ Å« ÃßÁø·Â°ú ¸ð¸àÆ®¸¦ ¹ßÈÖÇÔÀ» º¸¿©ÁØ´Ù. ÀÌ ¿¬±¸´Â ¾Æ¿ï·¯ ¼ö·ÂÅͺó µå·¡ÇÁÆ®°ü¿¡¼ÀÇ ºÎÁ¤·ù¸¦ RANS/LESÀÇ È¥¼º¸ðÇü Áï DES¸¦ ÀÌ¿ëÇÏ¿© ÇØ¼®ÇÏ¿´À¸¸ç, ¹°°í±â°¡ µå·¡ÇÁÆ®°ü³»¿¡¼ ¹æÇâ°¨°¢À» »ó½ÇÇϰųª °úµµÇÏ°Ô ÁöüÇϵµ·Ï ÇÒ ¼ö ÀÖ´Â ³·ù°¡ ¹ß»ýÇÔÀ» º¸¿©ÁØ´Ù. |
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This paper presents numerical works carried out for developing an advanced computational framework for understanding injury- and mortality-inducing flow phenomena in hydropower facilities. Large-eddy simulation (LES) of a circular jet flow is carried out to help interpret the results of recent experiments that exposed live fish to the shear zone of a turbulent jet. The instantaneous flow field of LES is characterized by intense velocity, pressure, and vorticity fluctuations, which could exert forces and moments on a fish considerably larger than those exerted by the same fish exposed to the corresponding steady, time-averaged flow. In this study, also, unsteady modeling of flow in a hydroturbine draft tubewas carried out using a hybrid unsteady RANS/LES, so-called detached-eddy simulation (DES). Results from DES show that the potential for disorientation and excessive residence times of fish within the draft tube is certainly considerable. |
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Ű¿öµå |
¼öÄ¡¸ðÀÇ;¹°°í±â;³·ù;¼ö·ÂÅͺó µå·¡ÇÁÆ®°ü;Numerical simulation;Fish;Turbulent flow;Hydroturbine draft tube; |
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.38, no.5, 2005³â, pp.365-377
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200531234553618)
¾ð¾î : ¿µ¾î |
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³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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