{"id":696004,"date":"2024-09-23T06:49:15","date_gmt":"2024-09-23T05:49:15","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=696004"},"modified":"2024-09-23T06:49:15","modified_gmt":"2024-09-23T05:49:15","slug":"dong-chay-nhot-trong-quy-trinh-san-xuat","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/dong-chay-nhot-trong-quy-trinh-san-xuat\/","title":{"rendered":"D\u00f2ng ch\u1ea3y nh\u1edbt trong quy tr\u00ecnh s\u1ea3n xu\u1ea5t"},"content":{"rendered":"<p class=\"sidekick\">D\u00f2ng ch\u1ea3y nh\u1edbt trong quy tr\u00ecnh s\u1ea3n xu\u1ea5t: T\u00ecm hi\u1ec3u c\u00e1ch d\u1ea7u nh\u1edbt v\u00e0 c\u00e1c ch\u1ea5t l\u1ecfng nh\u1edbt t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/dong_chay_nhot_trong_quy_trinh_san_xuat.png\" alt=\"D\u00f2ng ch\u1ea3y nh\u1edbt trong quy tr\u00ecnh s\u1ea3n xu\u1ea5t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>D\u00f2ng Ch\u1ea3y Nh\u1edbt Trong Quy Tr\u00ecnh S\u1ea3n Xu\u1ea5t<\/h2>\n<p>D\u00f2ng ch\u1ea3y nh\u1edbt l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c quy tr\u00ecnh s\u1ea3n xu\u1ea5t. Hi\u1ec3u r\u00f5 v\u1ec1 d\u00f2ng ch\u1ea3y nh\u1edbt c\u00f3 th\u1ec3 gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 s\u1ea3n xu\u1ea5t v\u00e0 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng.<\/p>\n<h2>D\u00f2ng Ch\u1ea3y Nh\u1edbt L\u00e0 G\u00ec?<\/h2>\n<p>D\u00f2ng ch\u1ea3y nh\u1edbt m\u00f4 t\u1ea3 c\u00e1ch ch\u1ea5t l\u1ecfng c\u00f3 \u0111\u1ed9 nh\u1edbt cao, nh\u01b0 d\u1ea7u ho\u1eb7c m\u1ee1, di chuy\u1ec3n qua m\u1ed9t \u1ed1ng ho\u1eb7c k\u00eanh d\u1eabn. \u0110\u1ed9 nh\u1edbt l\u00e0 m\u1ed9t th\u01b0\u1edbc \u0111o c\u1ee7a \u0111\u1ed9 d\u00e0y \u0111\u1eb7c v\u00e0 s\u1ef1 kh\u00e1ng l\u1ea1i c\u1ee7a ch\u1ea5t l\u1ecfng khi ch\u1ea3y. \u0110\u01a1n v\u1ecb \u0111o \u0111\u1ed9 nh\u1edbt th\u01b0\u1eddng l\u00e0 Pascal-gi\u00e2y (Pa.s) ho\u1eb7c Centipoise (cP).<\/p>\n<h2>Ph\u01b0\u01a1ng Tr\u00ecnh C\u01a1 B\u1ea3n<\/h2>\n<p>Ph\u01b0\u01a1ng tr\u00ecnh \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 m\u00f4 t\u1ea3 d\u00f2ng ch\u1ea3y nh\u1edbt l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh c\u1ee7a Newton v\u1ec1 \u0111\u1ed9 nh\u1edbt:<\/p>\n<p>\\(\\tau = \\mu \\frac{du}{dy}\\)<\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li>\\(\\tau\\) l\u00e0 \u1ee9ng su\u1ea5t c\u1eaft (Pa)<\/li>\n<li>\\(\\mu\\) l\u00e0 \u0111\u1ed9 nh\u1edbt \u0111\u1ed9ng h\u1ecdc (Pa.s)<\/li>\n<li>\\(\\frac{du}{dy}\\) l\u00e0 gradient t\u1ed1c \u0111\u1ed9 (s<sup>-1<\/sup>)<\/li>\n<\/ul>\n<h2>D\u00f2ng Ch\u1ea3y Laminar v\u00e0 Turbulent<\/h2>\n<p>D\u00f2ng ch\u1ea3y nh\u1edbt c\u00f3 th\u1ec3 ph\u00e2n ra l\u00e0m hai lo\u1ea1i ch\u00ednh: d\u00f2ng ch\u1ea3y laminar (\u1ed5n \u0111\u1ecbnh) v\u00e0 d\u00f2ng ch\u1ea3y turbulent (h\u1ed7n lo\u1ea1n).<\/p>\n<ul>\n<li><b>D\u00f2ng Ch\u1ea3y Laminar:<\/b> D\u00f2ng ch\u1ea3y n\u00e0y c\u00f3 d\u1ea1ng c\u00e1c l\u1edbp ch\u1ea5t l\u1ecfng ch\u1ea3y song song m\u00e0 kh\u00f4ng b\u1ecb h\u1ed7n lo\u1ea1n. D\u00f2ng ch\u1ea3y laminar d\u1ec5 d\u1ef1 \u0111o\u00e1n v\u00e0 th\u01b0\u1eddng x\u1ea3y ra \u0111\u1ed1i v\u1edbi ch\u1ea5t l\u1ecfng c\u00f3 \u0111\u1ed9 nh\u1edbt cao ho\u1eb7c khi l\u01b0u l\u01b0\u1ee3ng ch\u1ea3y th\u1ea5p.<\/li>\n<li><b>D\u00f2ng Ch\u1ea3y Turbulent:<\/b> \u0110\u00e2y l\u00e0 d\u1ea1ng d\u00f2ng ch\u1ea3y h\u1ed7n lo\u1ea1n, v\u1edbi c\u00e1c \u0111\u01b0\u1eddng ch\u1ea3y t\u1ef1 do xen l\u1eabn v\u00e0o nhau. D\u00f2ng ch\u1ea3y turbulent x\u1ea3y ra khi l\u01b0u l\u01b0\u1ee3ng ch\u1ea3y cao ho\u1eb7c \u0111\u1ed1i v\u1edbi ch\u1ea5t l\u1ecfng c\u00f3 \u0111\u1ed9 nh\u1edbt th\u1ea5p.<\/li>\n<\/ul>\n<h2>S\u1eed D\u1ee5ng Trong Quy Tr\u00ecnh S\u1ea3n Xu\u1ea5t<\/h2>\n<ul>\n<li><b>H\u1ec7 Th\u1ed1ng B\u00f4i Tr\u01a1n:<\/b> C\u00e1c m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p th\u01b0\u1eddng c\u1ea7n b\u00f4i tr\u01a1n \u0111\u1ec3 gi\u1ea3m ma s\u00e1t v\u00e0 m\u00e0i m\u00f2n. D\u00f2ng ch\u1ea3y nh\u1edbt c\u1ee7a d\u1ea7u b\u00f4i tr\u01a1n c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t c\u1ea9n th\u1eadn \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.<\/li>\n<li><b>S\u1ea3n Xu\u1ea5t H\u00f3a Ch\u1ea5t:<\/b> Trong s\u1ea3n xu\u1ea5t h\u00f3a ch\u1ea5t, ki\u1ec3m so\u00e1t d\u00f2ng ch\u1ea3y nh\u1edbt gi\u00fap duy tr\u00ec \u0111\u1ec1u \u0111\u1eb7n quy tr\u00ecnh v\u00e0 t\u0103ng hi\u1ec7u qu\u1ea3 s\u1ea3n xu\u1ea5t.<\/li>\n<li><b>C\u00f4ng Ngh\u1ec7 Th\u1ef1c Ph\u1ea9m:<\/b> C\u00e1c s\u1ea3n ph\u1ea9m nh\u01b0 siro, kem hay n\u01b0\u1edbc s\u1ed1t c\u00f3 \u0111\u1ed9 nh\u1edbt cao c\u1ea7n h\u1ec7 th\u1ed1ng d\u1eabn ch\u1ea5t l\u1ecfng \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ea3n ph\u1ea9m \u0111\u1ea1t chu\u1ea9n ch\u1ea5t l\u01b0\u1ee3ng.<\/li>\n<\/ul>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>D\u00f2ng ch\u1ea3y nh\u1edbt \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong nhi\u1ec1u quy tr\u00ecnh s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p. Hi\u1ec3u v\u00e0 ki\u1ec3m so\u00e1t d\u00f2ng ch\u1ea3y nh\u1edbt gi\u00fap t\u1ed1i \u01b0u h\u00f3a h\u1ec7 th\u1ed1ng, n\u00e2ng cao hi\u1ec7u qu\u1ea3 s\u1ea3n xu\u1ea5t v\u00e0 gi\u1ea3m thi\u1ec3u chi ph\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>D\u00f2ng ch\u1ea3y nh\u1edbt trong quy tr\u00ecnh s\u1ea3n xu\u1ea5t: T\u00ecm hi\u1ec3u c\u00e1ch d\u1ea7u nh\u1edbt v\u00e0 c\u00e1c ch\u1ea5t l\u1ecfng nh\u1edbt t\u00e1c \u0111\u1ed9ng \u0111\u1ebfn hi\u1ec7u su\u1ea5t v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng s\u1ea3n xu\u1ea5t c\u00f4ng nghi\u1ec7p.<\/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":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>D\u00f2ng ch\u1ea3y nh\u1edbt trong quy tr\u00ecnh s\u1ea3n 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