Á÷ÌåÁ¦Ñ§Ï°Ì⼯Óë´ð°¸½âÎö ÏÂÔØ±¾ÎÄ

ÄÜË͵½¶àÔ¶£¿£¨Ë®ÎÂt=25¡æ£©

5-14 Ò»ÊäË®¹Ü³¤l=1000m£¬ÄÚ¾¶d=300mm£¬¹Ü±Úµ±Á¿´Ö²Ú¸ß¶È¡÷=1.2mm£¬

Ô˶¯Õ³¶È¦Í=0.013 1cm2/s£¬ÊÔÇóµ±Ë®Í·Ëðʧhf=7.05mʱËùͨ¹ýµÄÁ÷Á¿¡£

5-15 Ô²¹ÜÖ±¾¶d=10cm£¬´Ö²Ú¶È¡÷=2mm£¬Èô²âµÃ2m³¤µÄ¹Ü¶ÎÖеÄˮͷËðʧΪ0.3m£¬Ë®ÎÂΪ10¡æ¡£ÎÊ´ËʱÊÇË®Á¦¹â»¬¹Ü»¹ÊÇË®Á¦´Ö²Ú¹ÜÁ÷¶¯£¿Èç¹ÜÄÚÁ÷¶¯ÊôË®Á¦¹â»¬Çø£¬ÎÊˮͷËðʧ¿É¼õÖÁ¶àÉÙ£¿

5-16 »ìÄýÍÁÅÅË®¹ÜµÄË®Á¦°ë¾¶R=0.5m¡£Ë®¾ùÔÈÁ÷¶¯1kmµÄˮͷËðʧΪ1n£¬´Ö²ÚϵÊýn=0.014£¬ÊÔ¼ÆËã¹ÜÖÐÁ÷ËÙ¡£

5-17 ÓñÃˮƽÊäËÍζÈt=20¡æ¼°Á÷Á¿Q=90L/sµÄË®£¬¾­Ö±¾¶d=250mm£¬

l=1000mµÄк¸½Ó¸Ö¹ÜÖÁÓÃË®µã£¬ÊÔÇóˮͷËðʧ¡£

5-18 ÈÝÖØ¦Ã=8435N/m3µÄʯÓÍ£¬ÔÚË®±ÃѹÁ¦p=1930kPaÏÂͨ¹ýÖ±¾¶d=250mmµÄˮƽÊäÓ͹ܣ¬ÊäË;àÀël=20km£¬ÈçÔ˶¯Õ³¶È¦Í=0.30cm2/s£¬ÊÔÇóʯÓ͵ÄÁ÷Á¿¡£

5-19 ÓÐһˮ¹Ü£¬¹Ü³¤l=500m£¬¹Ü¾¶d=300m£¬´Ö²Ú¸ß¶È¡÷=0.2mm£¬Èôͨ¹ýÁ÷Á¿Q=600L/s£¬Ë®ÎÂ20¡æ£¬ÊÔ£º

£¨1£©ÅбðÁ÷̬£» £¨2£©¼ÆËãÑØ³ÌËðʧ£» £¨3£©Çó¶ÏÃæÁ÷ËÙ·Ö²¼¡£

5-20 Á÷ËÙÓɦÔ1±äΪ¦Ô2µÄͻȻÀ©´ó¹Ü£¬Èç·ÖΪ¶þ´ÎÀ©´ó£¬ÖмäÁ÷È¡ºÎֵʱ¾Ö²¿Ë®Í·ËðʧС£¬´ËʱˮͷËðʧΪ¶àÉÙ£¿²¢ÓëÒ»´ÎÀ©´óʱµÄˮͷËðʧ±È½Ï¡£

5-21 Ë®´Ó·â±ÕÈÝÆ÷AÑØÖ±¾¶d=25mm¡¢³¤¶Èl=10mµÄ¹ÜµÀÁ÷ÈëÈÝÆ÷B¡£Èô

ÈÝÆ÷AË®ÃæµÄÏà¶ÔѹǿΪ2¸ö¹¤³Ì´óÆøÑ¹£¬H1=1m£¬H2=5m£¬¾Ö²¿×èÁ¦ÏµÊý¦Æ=0.5£¬¦Æ·§=4.0£¬¦ÆÍä=0.3£¬ÑسÌ×îϵÊý¦Ë=0.025£¬ÇóÁ÷Á¿Q¡£

½ø

Ìâ5-20 ͼ

Ìâ 5-21 ͼ

5-22 ×ÔË®³ØÖÐÒý³öÒ»¸ù¾ßÓÐÈý¶Î²»Í¬Ö±¾¶µÄË®¹ÜÈçͼËùʾ¡£ÒÑÖªd=50mm£¬D=200mm£¬l=100m£¬H=12m£¬¾Ö²¿×èÁ¦ÏµÊý¦Æ½ø=0.5£¬¦Æ·§=5.0£¬£¬ÑسÌ×èÁ¦ÏµÊý¦Ë=0.03£¬Çó¹ÜÖÐͨ¹ýµÄÁ÷Á¿²¢»æ³ö×ÜˮͷÏßÓë²âѹ¹ÜˮͷÏß¡£

5-23 ͼÖÐl=75cm£¬d=2.5cm£¬¦Ô=3.0m/s£¬¦Ë=0.020£¬¦Æ½ø=0.5£¬¼ÆËãË®Òø²îѹ¼ÆµÄË®ÒøÃæ¸ß²îhp£¬²¢±íʾ³öË®ÒøÃæ¸ß²î·½Ïò¡£

Ìâ 5-22 ͼ

Ìâ 5-23 ͼ

5-24 ÈçͼËùʾΪһͻȻÀ©´óµÄ¹ÜµÀ£¬Æä¹Ü¾¶ÓÉd1=50mmͻȻÀ©´óµ½d2=100mm£¬¹ÜÖÐͨ¹ýÁ÷Á¿Q=16m3/hµÄË®¡£ÔÚ½ØÃæ¸Ä±ä´¦²åÈëÒ»²îѹ¼Æ£¬ÆäÖгäÒÔËÄÂÈ»¯Ì¼(¦Ñ2=1600kg/m3)£¬¶ÁµÃµÄÒºÃæ¸ß¶È²îh=173mm¡£ÊÔÇó¹Ü¾¶Í»È»À©´óµÄËðʧϵÊý£¬²¢°Ñ²âµÃµÄ½á¹ûÓë°´ÀíÂÛ¼ÆËãµÄ½á¹ûÏà±È½Ï¡£

5-25 ¼ÆËãͼÖÐÖð½¥À©´ó¹ÜµÄ¾Ö²¿×èÁ¦ÏµÊý¡£ÒÑÖªd1=7.5cm£¬p1=0.7¹¤³Ì´óÆøÑ¹£¬ d2=15cm£¬p2=1.4¹¤³Ì´óÆøÑ¹£¬l=150cm£¬Á÷¹ýµÄË®Á¿Q=56.6L/s¡£

Ìâ5-24 ͼ

Ìâ5-25 ͼ

5-26 ²â¶¨Ò»µû·§µÄ¾Ö²¿×èÁ¦ÏµÊý×°ÖÃÈçͼËùʾ£¬ÔÚµû·§µÄÉÏ¡¢ÏÂÓÎ×°ÉèÈý¸ö²âѹ¹Ü£¬Æä¼ä¾àl1=1m£¬l2=2m¡£ÈôÔ²¹ÜÖ±¾¶d=50mm£¬Êµ²â¨Œ1=150cm£¬¨Œ2=125cm£¬¨Œ3=40cm£¬Á÷ËÙ¦Ô=3m/s£¬ÊÔÇóµû·§µÄ¾Ö²¿×èÁ¦ÏµÊý¦ÆÖµ¡£

Ìâ 5-26 ͼ

5-27 Ò»Ô²ÐÎÇŶÕÁ¢ÓÚË®ÖУ¬ÇŶÕÖ±¾¶Îª0.4m£¬Ë®Éî2m£¬Æ½¾ùÁ÷ËÙ2m/s¡£ÊÔÇóÇŶÕÊܵ½µÄË®Á÷×÷ÓÃÁ¦¡££¨Ë®ÎÂΪ20¡æ£©

5-28 Ò»¸öÖ±¾¶d=1cm£¬±ÈÖØÎª1.82µÄСÇòÔÚ¾²Ë®ÖÐϳÁ£¬´ïµ½µÈËÙ³Á½µÊ±ËÙ¶Èu0=463m/s£¬Çó£º

£¨1£©µÈËÙ³Á½µÊ±Ð¡ÇòËùÊܵ½µÄÈÆÁ÷×èÁ¦D£» £¨2£©ÈÆÁ÷×èÁ¦ÏµÊýCD¼°À×ŵÊýRe¡££¨Ë®ÎÂΪ20¡æ£©