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Çѱ¹¼öÀÚ¿øÇÐȸ / v.30, no.5, 1997³â, pp.467-475
¿øÇü¹Ù´Ú ©ÀÇ À¯¼Ó±¸Á¶ ÇØ¼®
( Analysis of Velocity Structure of Round Wall Jet )
±è´ë±Ù;¼­ÀÏ¿ø; ¼­¿ï´ëÇб³ ´ëÇпø Åä¸ñ°øÇаú;¼­¿ï´ëÇб³ °ø°ú´ëÇÐ Åä¸ñ°øÇаú;
 
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º» ¿¬±¸¿¡¼­´Â ½ÇÇè°³¼ö·Î¿¡ ¿Â¼ö¹æ·ù¿ë ¹æ·ù±Ô°¡ ÀÖ´Â ¹æÆÄÁ¦ÀÇ ¸ðÇüÀ» ¼³ÇÇÇÏ¿© ¹Ù´ÚulcornerÀÇ À¯¼ÓºÐÆ÷¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¶ÇÇÑ 3Â÷¿øÀÇ ¸ðÇüÀÎ Fluent ¸ðÇüÀ» ÀÌ¿ëÇÏ¿© ¹æÆÄÁ¦ÀÇ ¹æ·ù±¸·ÎºÎÅÍ ¹èÃâµÈ ¹Ù´Ú ©ÀÇ À¯¼Ó±¸Á¶¸¦ ¼öÄ¡¸ðÀÇÇÏ¿© ½ÇÇè°á°ú¿Í ºñ±³.°ËÁõÇÏ¿´À¸¸ç È帧Ư¼ºÀ» ±Ô¸íÇÏ¿´´Ù. ¹Ù´Ú ©Àº ÀÚÀ¯ ©¿¡ ºñÇÏ¿© È帧ÀÇ È®¸³±¸°£ÀÌ Âª¾ÒÀ¸¸ç, Á¾¹æÇâ°Å¸®¿¡ ´ëÇÑ  © Áß¾ÓÀ¯¼ÓÀÇ °¨¼èÀ²ÀÌ ÀÚÀ¯ ©º¸´Ù Å©°Ô ³ªÅ¸³ª°í ÀÖÀ½ÀÌ ¹àÇôÁ³´Ù. ´Ü¼ø ©°ú ºÎ·Â ©ÀÇ  © Áß¾Ó¼±¿¡¼­ÀÇ Á¾¹æÇâÀ¯¼ÓÀ» ºñ±³ÇÑ °á°ú, ¹æ·ù±¸ ±Ùó¿¡¼­´Â ºÎ·ÂulcornerÀÇ À¯¼ÓÀÌ Å©°Ô ¹ß»ýÇϳª x/lQ°¡ 15º¸´Ù Å« ±¸°£¿¡´Â µµ¸®¾î ÀÛ°Ô µÈ´Ù. Á¾¹æÇâÀ¯¼ÓÀÇ ¿¬Á÷ºÐÆ÷¸¦ ºñ±³ÇÑ °á°í, ¹æ·ù±¸·ÎºÎÅÍ ¸Ö¾îÁú¼ö·Ï ÀúÃþ¿¡¼­´Â ´Ü¼ø ©ÀÇ À¯¼ÓÀÌ Å©°Ô ³ªÅ¸³ª¸ç »óÃæ¿¡¼­´Â ´Ü¼ø ©ÀÇ ºÎÀÇ À¯¼ÓÀÌ Å©°Ô ³ªÅ¸³ª°í ÀÖÀ½ÀÌ ¹àÇôÁ³´Ù. ¶ÇÇÑ ºÎ·Â ©ÀÇ °æ¿ì ÀÚÀ¯¼ö¸é¿¡¼­ÀÇ À¯¼ÓÀÇ ºÐ¸®°¡ ´Ü¼ø ©º¸´Ù ¹æ·ù±¸·ÎºÎÅÍ °¡±î¿î °Å¸®¿¡¼­ ¹ß»ýÇÑ´Ù. ºÎ·Â ©ÀÇ ¿¬Á÷¹æÇâÀ¸·ÎÀÇ ÆøÀº ´Ü¼ø ©ÀÇ Æøº¸´Ù »¡¸® È®ÀåµÈ´Ù.
In this study, breakwater model which has several outlet pipes to discharge heated water is settled in the experimental open channel and velocity distribution of wall jet is measured. Numerical simulation of velocity structure of wall jet using 3-dimensional computer model. Fluent model, is also carried out. The calculated results are verified with the experimental results and the flow characteristics of wall jet are investigated. The length of zone of flow establishment of wall jet is shorter than that of free jet, and the diminution rate of jet centerline longitudinal velocity is larger than that of free jet. Characteristics of buoyant jet and non-buoyant simple jet simulated by Fluent model are compared. Near the outlet pipe, in the region where x/lQ is over 15, this is reversed. Comparison of vertical distribution of longitudinal velocity shows that positive velocity of non-buoyant jet is bigger than that of buoyant jet in the bottom layer and in the upper layer, negative velocity of non-buoyant jet is bigger too. Flow separation in free surface of the buoyant jet occurs in smaller distances from the outlet than the non-buoyant jet. Buoyant jet expands faster than the non-buoyant jet in vertical direction.
 
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.30, no.5, 1997³â, pp.467-475
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199711920100432)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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