·¢²¼Ê±¼ä : ÐÇÆÚÈÕ ÎÄÕ¡¶´«ÈÈѧÆÚÄ©¸´Ï°ÊÔÌâ¿â¡·º¬²Î¿¼´ð°¸Òªµã¸üÐÂÍê±Ï¿ªÊ¼ÔĶÁ07ab50bb5bcfa1c7aa00b52acfc789eb162d9ef8
¾«Æ·Îĵµ
µÄµ¼ÈÈϵÊý×îС£©
5£® ʲôÊǽӴ¥ÈÈ×è?¼õÉÙ¹ÌÌå±ÚÃæÖ®¼äµÄ½Ó´¥ÈÈ×èÓÐÄÄЩ·½·¨?
£¨Ìáʾ£º²ÄÁϱíÃæÓÉÓÚ´æÔÚÒ»¶¨µÄ´Ö²Ú¶ÈʹÏà½Ó´¥µÄ±íÃæÖ®¼ä´æÔÚ¼ä϶£¬¸øµ¼Èȹý³Ì´øÀ´¶îÍâÈÈ×è³ÆΪ½Ó´¥ÈÈ×裬½Ó´¥ÈÈ×èµÄ´æÔÚʹÏàÁÚµÄÁ½¸ö±íÃæ²úÉúνµ(ζȲ»Á¬Ðø)¡£½Ó´¥ÈÈ×èÖ÷ÒªÓë±íÃæ´Ö²Ú¶È¡¢±íÃæËùÊÜѹÁ¦¡¢²ÄÁÏÓ²¶È¡¢Î¶ȼ°ÖÜΧ½éÖʵÄÎïÐÔµÈÓйأ¬Òò´Ë¿ÉÒÔ´ÓÕâЩ·½Ã濼ÂǼõÉÙ½Ó´¥ÈÈ×èµÄ·½·¨£¬´ËÍ⣬Ҳ¿ÉÔÚ¹ÌÌå½Ó´¥ÃæÖ®¼ä³ÄÒÔµ¼ÈÈϵÊý´óµÄͲ»òÂÁ²µÈÒÔ¼õÉÙ½Ó´¥ÈÈ×è¡££©
µÚÈýÕ ¶ÔÁ÷´«ÈÈ
Ò»¡¢Ãû´Ê½âÊÍ
1£® Ëٶȱ߽ç²ã£ºÔÚÁ÷³¡ÖбÚÃ渽½üÁ÷ËÙ·¢Éú¼±¾ç±ä»¯µÄ±¡²ã¡£
2£® ζȱ߽ç²ã£ºÔÚÁ÷Ìåζȳ¡ÖбÚÃ渽½üζȷ¢Éú¼±¾ç±ä»¯µÄ±¡²ã¡£ 3£® ¶¨ÐÔζȣºÈ·¶¨»»Èȹý³ÌÖÐÁ÷ÌåÎïÐÔµÄζȡ£ 4£® ÌØÕ÷³ß¶È£º¶ÔÓÚ¶ÔÁ÷´«ÈÈÆð¾ö¶¨×÷Óõļ¸ºÎ³ß´ç¡£
5£® ÏàËÆ×¼Ôò(ÈçNu,Re,Pr,Gr,Ra)£ºÓɼ¸¸ö±äÁ¿×é³ÉµÄÎÞÁ¿¸ÙµÄ×éºÏÁ¿¡£
6£® Ç¿ÆȶÔÁ÷´«ÈÈ£ºÓÉÓÚ»úе(±Ã»ò·ç»úµÈ)µÄ×÷ÓûòÆäËüѹ²î¶øÒýÆðµÄÏà¶ÔÔ˶¯¡£ 7£® ×ÔÈ»¶ÔÁ÷´«ÈÈ£ºÁ÷Ìå¸÷²¿·ÖÖ®¼äÓÉÓÚÃܶȲî¶øÒýÆðµÄÏà¶ÔÔ˶¯¡£
8£® ´ó¿Õ¼ä×ÔÈ»¶ÔÁ÷´«ÈÈ£º´«ÈÈÃæÉϱ߽ç²ãµÄÐγɺͷ¢Õ¹²»ÊÜÖÜΧÎïÌåµÄ¸ÉÈÅʱµÄ×ÔÈ»¶ÔÁ÷´«
ÈÈ¡£
9£® Öé×´Äý½á£ºµ±Äý½áÒº²»ÄÜÈóʪ±ÚÃæ(¦È>90?)ʱ£¬Äý½áÒºÔÚ±ÚÃæÉÏÐγÉÐí¶àÒºµÎ£¬¶ø²»ÐγÉ
Á¬ÐøµÄҺĤ¡£
10£® Ĥ״Äý½á£ºµ±ÒºÌåÄÜÈóʪ±ÚÃæʱ£¬Äý½áÒººÍ±ÚÃæµÄÈóʪ½Ç(ÒºÌåÓë±ÚÃæ½»½ç´¦µÄÇÐÃæ¾
ÒºÌåµ½±ÚÃæµÄ½»½Ç)¦È<90?£¬Äý½áÒºÔÚ±ÚÃæÉÏÐγÉÒ»²ãÍêÕûµÄҺĤ¡£
11£® ºË̬·ÐÌÚ£ºÔÚ¼ÓÈÈÃæÉϲúÉúÆûÅÝ£¬»»ÈÈβîС£¬ÇÒ²úÉúÆûÅݵÄËÙ¶ÈСÓÚÆûÅÝÍÑÀë¼ÓÈÈ
±íÃæµÄËٶȣ¬ÆûÅݵľçÁÒÈŶ¯Ê¹±íÃæ´«ÈÈϵÊýºÍÈÈÁ÷Ãܶȶ¼¼±¾çÔö¼Ó¡£
12£® Ĥ̬·ÐÌÚ£ºÔÚ¼ÓÈȱíÃæÉÏÐγÉÎȶ¨µÄÆûĤ²ã£¬Ïà±ä¹ý³Ì²»ÊÇ·¢ÉúÔÚ±ÚÃæÉÏ£¬¶øÊÇÆûÒº
½çÃæÉÏ£¬µ«ÓÉÓÚÕôÆûµÄµ¼ÈÈϵÊýԶСÓÚÒºÌåµÄµ¼ÈÈϵÊý£¬Òò´Ë±íÃæ´«ÈÈϵÊý´ó´óϽµ¡£ ¶þ¡¢Ìî¿ÕÌâ 1£® Ó°Ïì×ÔÈ»¶ÔÁ÷´«ÈÈϵÊýµÄÖ÷ÒªÒòËØ
ÓУº ¡¢ ¡¢ ¡¢ ¡¢ ¡¢ ¡£ (Á÷¶¯ÆðÒò£¬Á÷¶¯Ëٶȣ¬Á÷ÌåÓÐÎÞÏà±ä£¬±ÚÃæµÄ¼¸ºÎÐÎ×´¡¢´óСºÍλÖã¬Á÷ÌåµÄÈÈÎïÀíÐÔÖÊ)
2£® Ëٶȱ߽ç²ãÊÇÖ¸ ¡£
£¨ÔÚÁ÷³¡ÖбÚÃ渽½üÁ÷ËÙ·¢Éú¼±¾ç±ä»¯µÄ±¡²ã¡££© ζȱ߽ç²ãÊÇÖ¸ ¡£ £¨ÔÚÁ÷Ìåζȳ¡ÖбÚÃ渽½üζȷ¢Éú¼±¾ç±ä»¯µÄ±¡²ã¡££©
3£® Á÷Ìå¸Õ¸ÕÁ÷Èëºã±ÚεĹܵÀ×÷²ãÁ÷´«ÈÈʱ£¬Æä¾Ö²¿¶ÔÁ÷´«ÈÈϵÊýÑعܳ¤Öð½¥ £¬Õâ
ÊÇÓÉÓÚ ¡£ £¨¼õС£¬±ß½ç²ãºñ¶ÈÑعܳ¤Öð½¥Ôöºñ£©
¡£ 9»¶ÓÏÂÔØ
¾«Æ·Îĵµ
4£® ζȱ߽ç²ãÔ½ ¶ÔÁ÷´«ÈÈϵÊýԽС£¬Ç¿»¯´«ÈÈӦʹζȱ߽ç²ã
Ô½ ¡£ £¨ºñ£¬²¾£©
5£® Á÷ÌåÁ÷¹ýÍäÇúµÄ¹ÜµÀ»òÂÝÐý¹Üʱ£¬¶ÔÁ÷´«ÈÈϵÊý»á £¬ÕâÊÇÓÉ
ÓÚ ¡£
£¨Ôö´ó£¬ÀëÐÄÁ¦µÄ×÷ÓòúÉúÁ˶þ´Î»·Á÷ÔöÇ¿ÁËÈŶ¯£©
6£® Á÷ÌåºáÂÓ¹ÜÊøʱ£¬Ò»°ãÇé¿öÏ£¬ ²¼ÖõÄƽ¾ù¶ÔÁ÷´«ÈÈϵÊýÒª±È
²¼ÖÃʱ¸ß¡£ £¨²æÅÅ£¬Ë³ÅÅ£©
7£® ¹ÜÍâÁ÷¶¯´«ÈÈ£¬ÓÐ×ÝÏò³åË¢ºÍºáÏò³åË¢Ö®·Ö£¬ÔÚÆäËûÌõ¼þÏàͬʱ£¬ÒÔ Ïò³åË¢
·½Ïò´«ÈȸüΪǿÁÒ¡£ £¨ºáÏò£©
8£® ¶ÔÁ÷´«ÈÈ΢·Ö·½³ÌʽµÄ±í´ïʽΪ ¡£ÆäÖУ¬¦ÁxÊÇ £¬¦Ë
??t?ÊÇ £¬¦¤tÊÇ £¬???y??ÊÇ ¡£
??y?0 £¨hx?????£¬¾Ö²¿»»ÈÈϵÊý£¬Á÷Ìåµ¼ÈÈϵÊý£¬Ö÷Á÷Á÷ÌåζÈÓë±ÚÎÂÖ®²î£¬Ìù±Ú´¦Á÷?t??y??y?0???t?ÌåµÄ·¨Ïòζȱ仯ÂÊ£©
9£® ´¿¾»±¥ºÍÕôÆøĤ״Äý½áµÄÖ÷ÒªÈÈ×èÊÇ ¡£ £¨ÒºÄ¤µÄµ¼ÈÈÈÈ×裩
10£® ´óÈÝÆ÷±¥ºÍ·ÐÌÚÇúÏß¿É·ÖΪ ¡¢ ¡¢ ¡¢ ËÄ
¸öÇøÓò£¬ÆäÖÐ ¾ßÓÐβîС¡¢ÈÈÁ÷´óµÄ´«ÈÈÌص㡣 £¨×ÔÈ»¶ÔÁ÷¡¢ºË̬·ÐÌÚ¡¢¹ý¶É·ÐÌÚ¡¢Ä¤Ì¬·ÐÌÚ£¬ºË̬·ÐÌÚ£©
11£® À×ŵ±ÈÄâ²ÉÓà ģÐÍ£¬Æä½á¹ûÔÚPr£½ Ìõ¼þÏÂÓëʵÑé½âÏàÎǺÏ.
£¨µ¥²ã£¬1£©
12£® ·ÐÌÚµÄÁÙ½çÈÈͨÁ¿ÊÇÖ¸ ¡£
£¨µ±±ÚÃæ¹ýÈȶȴóµ½Ä³Ò»³Ì¶Èʱ£¬ÆûÅÝÀ´²»¼°ÍÑÀë¼ÓÈÈÃæ¶ø¿ªÊ¼Á¬³É²»Îȶ¨µÄÆûĤ£¬¼´ÓɺË̬·ÐÌÚ¿ªÊ¼ÏòĤ̬·ÐÌÚ¹ý¶É£¬³öÏÖÁÙ½çµãµÄÈÈÁ÷Ãܶȣ©
13£® ¸ñÀÏþ·ò×¼ÔòµÄÎïÀíÒâÒå £»±í´ïʽGr£½ ¡£ £¨Á÷ÌåÁ÷¶¯Ê±¸¡ÉýÁ¦ÓëÕ³ÖÍÁ¦Ö®±ÈµÄÎÞÁ¿¸ÙÁ¿£¬
g?v?tlc3?2£©
14£® ¼õС¹ÜÄÚÍÄÁ÷¶ÔÁ÷´«ÈÈÈÈ×èµÄ·½·¨
ÓÐ ¡¢ ¡¢ ¡¢ ¡£
£¨Ôö¼ÓÁ÷ËÙ£¬²ÉÓö̹ܡ£¸Ä±äÁ÷ÌåÎïÐÔ£¬Ôö¼Ó»»ÈÈÃæ»ý£¬ÈÅÁ÷£¬²ÉÓõ¼ÈÈϵÊý´óµÄÁ÷Ìå ÓÃС¹Ü¾¶µÈ£©
15£® ·´Ó³¶ÔÁ÷´«ÈÈÇ¿¶ÈµÄ×¼Ôò³ÆΪ ×¼Ôò¡£ £¨Å¬Èû¶û£©
¡£
10»¶ÓÏÂÔØ
¾«Æ·Îĵµ
16£® ÆÕÀÊÌØ×¼ÔòPrµÄÊýѧ±í´ïʽΪ £¬Ëü±íÕ÷ÁË µÄÏà
¶Ô´óС¡£
£¨¦Í/a£¬¶¯Á¿´«µÝÓëÈÈÁ¿´«µÝ£©
17£® ¹ÜÄÚ³ä·Ö·¢Õ¹ÍÄÁ÷µÄ´«ÈÈϵÊýÓëƽ¾ùÁ÷ËÙUµÄ ´Î·½³É ±È.£¬ÓëÄÚ
¾¶DµÄ ´Î·½³É ±È¡£ £¨0£®8£¬Õý£¬0£®2£¬·´£©
18£® ´ó¿Õ¼ä×ÔÈ»¶ÔÁ÷´¦ÓÚÍÄÁ÷״̬ʱÓÐ×ÔÄ£»¯ÌØÕ÷£¬´Ëʱ´«ÈÈϵÊýÓë Î޹ء£ £¨³ß´ç£©
19£® ×ÔÈ»¶ÔÁ÷´«ÈÈÔÚ Ìõ¼þÏ·¢Éú¹ØÓÚÌØÕ÷³ß¶ÈLµÄ×ÔÄ£»¯ÏÖÏó.¡£ £¨ÍÄÁ÷£©
20£® ÔÚÕôÆûµÄÄý½á¹ý³ÌÖУ¬ Äý½áµÄ´«ÈÈϵÊý´óÓÚ Äý½á¡£ £¨Öé×´£¬Ä¤×´£©
21£® ×ÔÈ»¶ÔÁ÷´«ÈÈÊÇÖ¸ ¡£
£¨Á÷ÌåÔÚ¸¡ÉýÁ¦×÷ÓÃϵĶÔÁ÷´«ÈÈ£©
22£® ¹Ü²ÛÄÚ¶ÔÁ÷´«ÈȵÄÈë¿ÚЧӦÊÇÖ¸ ¡£
£¨Á÷ÌåÈë¿Ú¶ÎÓÉÓÚÈȱ߽ç²ã½Ï±¡¶ø¾ßÓнϸߵĶÔÁ÷´«ÈÈϵÊý£©
23£® Á÷ÌåÔÚ´ó¿Õ¼äÑØÊú±Ú×÷×ÔÈ»¶ÔÁ÷´«ÈÈʱ£¬¶ÔÓÚÍÄÁ÷¹¤¿ö£¬Æä¶ÔÁ÷´«ÈÈϵÊýÕý±ÈÓÚÊú±Ú
¸ß¶ÈµÄ ´Î·½¡£ £¨0£©
24£® ´óÈÝÆ÷·ÐÌÚÇúÏß·ÖΪ ¡¢ ¡¢ ¡¢ ËĸöÇø¶Î¡£
£¨×ÔÈ»¶ÔÁ÷¡¢ºË̬·ÐÌÚ¡¢¹ý¶É·ÐÌÚ¡¢Ä¤Ì¬·ÐÌÚ£© Èý¡¢Ñ¡ÔñÌâ
1£® ÏÂÁи÷²ÎÊýÖУ¬ÊôÓÚÎïÐÔ²ÎÊýµÄÊÇ£º £¨1£© ´«ÈÈϵÊýK £¨2£© ÎüÊÕÂʦÁ
£¨3£© ÆÕÀÊÌØÊýPr £¨4£© ´«ÈÈϵÊýhc
2£® Á÷Ìå´¿×ÔÈ»¶ÔÁ÷´«ÈȵÄ×¼Ôò·½³Ì¿Éд³É
(1)Nu£½f(Re£¬Pr) (2)Nu£½f(Gr£¬Pr) (3)Nu£½f(Re£¬Gr£¬Pr) (4)Nu£½f(Bi£¬Fo)
3£® Á÷ÌåÂÓ¹ýƽ°å¶ÔÁ÷´«ÈÈʱ£¬ÔÚÏÂÁб߽ç²ã¸÷ÇøÖУ¬Î¶ȽµÖ÷Òª·¢ÉúÔÚ£º
(1)Ö÷Á÷Çø (2)ÍÄÁ÷±ß½ç²ã (3)²ãÁ÷µ×²ã (4)»º³åÇø (5)ÍÄÁ÷ºËÐÄÇø
4£® ¿ÕÆø×ÔÈ»¶ÔÁ÷´«ÈÈϵÊýÓëÇ¿ÆȶÔÁ÷ʱµÄ¶ÔÁ÷´«ÈÈϵÊýÏà±È£º
(1)ҪСµÄ¶à (2)Òª´óµÃ¶à (3)Ê®·Ö½Ó½ü (4)²»¿É±È½Ï 5£® ·ÐÌÚµÄÁÙ½çÈÈÁ÷Á¿qcÊÇ£º
£¨1£© ´Ó¹ýÀä·ÐÌÚ¹ý¶Éµ½±¥ºÍ·ÐÌÚµÄתÕ۵㠣¨2£© ´Ó×ÔÓÉÁ÷¶¯¹ý¶Éµ½ºË̬·ÐÌÚµÄתÕÛµã
£¨3£© ´ÓºË̬·ÐÌÚ¹ý¶Éµ½Ä¤Ì¬·ÐÌÚµÄתÕ۵㠡£
11»¶ÓÏÂÔØ
¾«Æ·Îĵµ
£¨4£© ´Ó²»Îȶ¨Ä¤Ì¬·ÐÌÚ¹ý¶Éµ½Îȶ¨Ä¤Ì¬·ÐÌÚµÄתÕÛµã
6£® Á÷ÌåÔÚ´ó¿Õ¼äÑØÊú±Ú×ÔÈ»¶ÔÁ÷´«ÈÈʱ£¬ÔÚÍÄÁ÷״̬Ï£»¶ÔÁ÷´«ÈÈϵÊýÕý±ÈÓÚÊú±Ú¸ß¶ÈµÄ
( )
(1)0´Î·½ (2)0.8´Î·½ (3)l/4´Î·½ (4)l/3´Î·½
7£® ÒºÌå·ÐÌÚʱ£¬ÆûÅÝÄÚµÄѹÁ¦´óÓÚÆûÅÝÍâÒºÌåµÄѹÁ¦£¬Ö÷ÒªÓÉÓÚÏÂÁÐÄĸöÒòËØÔì³ÉµÄ?
(1)´«ÈÈβî (2)±íÃæÕÅÁ¦ (3)¸¡ÉýÁ¦ (4)ÖØÁ¦ 8£® ¶¨ÐÍ×¼ÔòÊÇÖ¸£º
(1)°üº¬¶¨ÐͳߴçµÄ×¼Ôò (2)È«²¿ÓÉÒÑÖªÁ¿¹¹³ÉµÄ×¼Ôò (3)º¬ÓдýÇóÁ¿µÄ×¼Ôò (4)´ý¶¨×¼Ôò 9£® ¹¤³ÌÖУ¬½ÏΪ³£ÓõķÐÌÚ¹¤¿öÊÇÖ¸£º
(1)Ĥ̬·ÐÌÚ (2)ºË̬·ÐÌÚ (3)×ÔÈ»¶ÔÁ÷·ÐÌÚ £¨4£©ÒÔÉ϶¼²»ÊÇ 10£® ÏÂÊöÄÄÖÖÊֶζÔÌá¸ß¶ÔÁ÷´«ÈÈϵÊýÎÞЧ?
(1)Ìá¸ßÁ÷ËÙ (2)Ôö´ó¹Ü¾¶ (3)²ÉÓÃÈë¿ÚЧӦ (4)²ÉÓõ¼ÈÈϵÊý´óµÄÁ÷Ìå
11£® ÒÑ֪ijÆøÌåµÄÃܶÈΪ1.26kg/m3£¬±ÈÈÈΪ1.02kJ/(kg¡¤K)£¬µ¼ÈÈϵÊýΪ0.025W/(m¡¤K)£¬
Õ³¶ÈΪ15.1¡Á10-6m2/s£¬ÆäPr(ÆÕÀÊÌØ)×¼ÔòÊýΪ¶àÉÙ? ( ) (1)0.78 (2)0.02 (3)0.7 (4)0.62 12£® Nu(Ŭл¶ûÌØ)×¼Ôò·´Ó³£º ( )
(1)¹ßÐÔÁ¦ºÍÕ³ÖÍÁ¦µÄÏà¶Ô´óС (2)¶ÔÁ÷´«ÈÈÇ¿¶È (3)¸¡ÉýÁ¦ºÍÕ³ÖÍÁ¦µÄÏà¶Ô´óС (4)µ¼ÈÈÄÜÁ¦´óС 13£® ÃèÊö¸¡ÉýÁ¦Óëð¤ÖÍÁ¦µÄÏà¶Ô´óСµÄ×¼ÔòÊý³ÆΪ£º
£¨1£©Re (2)Gr (3)Pr (4)Ra
14£® µ±¹Ü³¤Ô¶´óÓڹܾ¶Ê±£¬Ô²¹ÜºáÏò²¼ÖÃʱµÄ¹ÜÍâĤ״Äý½á´«ÈÈϵÊýÓëÊú·ÅʱÏà±ÈÈçºÎ?
£¨1£© ºá·Åʱ´ó £¨2£© Á½Õ߲¶à £¨3£© Êú·Åʱ´ó £¨4£© ÎÞ·¨±È½Ï 15£®
ÎÞÁ¿¸Ù×éºÏ
g?v?tl3?2³ÆΪʲô׼Ôò£¿
(1)À×ŵRe (2)ÆÕÀÊÌØPr (3)Ŭл¶ûÌØNu (4)¸ñÀÏþ·òGr
16£® ÅжϹÜÄÚÍÄÁ÷Ç¿ÖƶÔÁ÷ÊÇ·ñÐèÒª½øÐÐÈË¿ÚЧӦÐÞÕýµÄÒÀ¾ÝÊÇʲô?
(1)l/d¡Ý70 (2)Re¡Ý104 (3)l/d<50 (4)l/d<104
17£® ¶ÔÁ÷´«ÈÈÒÔ ×÷Ϊ»ù±¾¼ÆËãʽ¡£
(1)¸µÀïÒ¶¶¨ÂÉ (2)Å£¶ÙÀäÈ´¹«Ê½ (3)ÆÕÀʿ˶¨ÂÉ (4)Å·Ä·¶¨ÂÉ
18£® ´Ó´«ÈȽǶȿ´£¬ÏÂÃ漸ÖÖÀäÈ´·½Ê½ÖУ¬ÄÄÖÖ·½Ê½µÄÀäȴЧ¹û»á×îºÃ?
(1)Ë®Àä (2)ÇâÀä (3)ÆøÀä (4)Ë®·ÐÌÚÀäÈ´
¡£
12»¶ÓÏÂÔØ