![\"\u1ed0ng](\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/ong_venturi_do_luu_luong_nhu_the_nao.png\")
<\/p>\n\u1ed0ng Venturi \u0111o l\u01b0u l\u01b0\u1ee3ng nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft gi\u1ea3i th\u00edch c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, \u1ee9ng d\u1ee5ng v\u00e0 l\u1ee3i \u00edch c\u1ee7a \u1ed1ng Venturi trong \u0111o d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng.<\/p>\n
<\/p>\n
\u1ed0ng Venturi l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb quan tr\u1ecdng trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t v\u00e0 c\u01a1 h\u1ecdc ch\u1ea5t l\u1ecfng \u0111\u1ec3 \u0111o l\u01b0u l\u01b0\u1ee3ng c\u1ee7a ch\u1ea5t kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng trong m\u1ed9t \u0111\u01b0\u1eddng \u1ed1ng. Thi\u1ebft k\u1ebf c\u1ee7a \u1ed1ng Venturi d\u1ef1a tr\u00ean nguy\u00ean l\u00fd Bernoulli, cho ph\u00e9p ch\u00fang ta t\u00ednh to\u00e1n l\u01b0u l\u01b0\u1ee3ng k\u1ebft h\u1ee3p gi\u1eefa s\u1ef1 thay \u0111\u1ed5i c\u1ee7a \u00e1p su\u1ea5t v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed \u0111i qua \u1ed1ng.<\/p>\n
\u1ed0ng Venturi ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd b\u1ea3o to\u00e0n n\u0103ng l\u01b0\u1ee3ng cho d\u00f2ng ch\u1ea3y kh\u00f4ng n\u00e9n, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh Bernoulli:<\/p>\n
\nP + \\(\\frac{1}{2}\\rho v^2\\) + \\(\\rho gh\\) = const\n<\/p>\n
Trong ph\u01b0\u01a1ng tr\u00ecnh tr\u00ean,<\/p>\n
<\/u1><\/p>\n \u1ed0ng Venturi g\u1ed3m ba ph\u1ea7n ch\u00ednh:<\/p>\n <\/o1><\/p>\n Khi ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed di chuy\u1ec3n qua \u1ed1ng Venturi, t\u1ed1c \u0111\u1ed9 c\u1ee7a n\u00f3 t\u0103ng khi \u0111i v\u00e0o ph\u1ea7n c\u1ed5 h\u1ecdng, d\u1eabn \u0111\u1ebfn gi\u1ea3m \u00e1p su\u1ea5t. B\u1eb1ng c\u00e1ch \u0111o s\u1ef1 ch\u00eanh l\u1ec7ch \u00e1p su\u1ea5t gi\u1eefa ph\u1ea7n v\u00e0o v\u00e0 c\u1ed5 h\u1ecdng, ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng tr\u00ecnh Bernoulli v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh li\u00ean t\u1ee5c \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh l\u01b0u l\u01b0\u1ee3ng.<\/p>\n Ph\u01b0\u01a1ng tr\u00ecnh li\u00ean t\u1ee5c cho d\u00f2ng ch\u1ea3y kh\u00f4ng n\u00e9n l\u00e0:<\/p>\n \n\\( A_1 v_1 = A_2 v_2 \\)\n<\/p>\n Trong \u0111\u00f3:<\/p>\n <\/u1><\/p>\n K\u1ebft h\u1ee3p c\u1ea3 hai ph\u01b0\u01a1ng tr\u00ecnh, ch\u00fang ta c\u00f3 th\u1ec3 t\u00ednh to\u00e1n l\u01b0u l\u01b0\u1ee3ng d\u00f2ng ch\u1ea3y (Q) b\u1eb1ng c\u00f4ng th\u1ee9c:<\/p>\n \n\\[ Trong \u0111\u00f3:<\/p>\n <\/u1><\/p>\n Nh\u01b0 v\u1eady, \u1ed1ng Venturi gi\u00fap \u0111o l\u01b0u l\u01b0\u1ee3ng m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c b\u1eb1ng c\u00e1ch t\u1eadn d\u1ee5ng s\u1ef1 thay \u0111\u1ed5i \u00e1p su\u1ea5t v\u00e0 v\u1eadn t\u1ed1c c\u1ee7a d\u00f2ng ch\u1ea3y.<\/p>\n \u1ed0ng Venturi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p kh\u00e1c nhau, bao g\u1ed3m:<\/p>\n <\/o1><\/p>\n V\u1edbi kh\u1ea3 n\u0103ng cung c\u1ea5p k\u1ebft qu\u1ea3 ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh, \u1ed1ng Venturi l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu trong vi\u1ec7c qu\u1ea3n l\u00fd v\u00e0 ki\u1ec3m so\u00e1t c\u00e1c h\u1ec7 th\u1ed1ng ch\u1ea5t l\u1ecfng hi\u1ec7n \u0111\u1ea1i.<\/p>\n","protected":false},"excerpt":{"rendered":" \u1ed0ng Venturi \u0111o l\u01b0u l\u01b0\u1ee3ng nh\u01b0 th\u1ebf n\u00e0o? B\u00e0i vi\u1ebft gi\u1ea3i th\u00edch c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng, \u1ee9ng d\u1ee5ng v\u00e0 l\u1ee3i \u00edch c\u1ee7a \u1ed1ng Venturi trong \u0111o d\u00f2ng ch\u1ea3y ch\u1ea5t l\u1ecfng.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"\nC\u1ea5u T\u1ea1o C\u1ee7a \u1ed0ng Venturi<\/h2>\n
Qu\u00e1 Tr\u00ecnh \u0110o L\u01b0u L\u01b0\u1ee3ng<\/h2>\n
\nQ = A_2 \\sqrt{ \\frac{2 (P_1 – P_2)}{\\rho ( \\frac{A_1^2}{A_2^2} -1 ) } }
\n\\]\n<\/p>\n\u1ee8ng D\u1ee5ng<\/h2>\n