{"id":708629,"date":"2024-09-27T05:11:08","date_gmt":"2024-09-27T04:11:08","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=708629"},"modified":"2024-09-27T05:11:08","modified_gmt":"2024-09-27T04:11:08","slug":"anh-huong-cua-chat-long-den-hinh-dang-khi-dong-hoc-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/anh-huong-cua-chat-long-den-hinh-dang-khi-dong-hoc-nhu-the-nao\/","title":{"rendered":"\u1ea2nh H\u01b0\u1edfng C\u1ee7a Ch\u1ea5t L\u1ecfng \u0110\u1ebfn H\u00ecnh D\u00e1ng Kh\u00ed \u0110\u1ed9ng H\u1ecdc Nh\u01b0 Th\u1ebf N\u00e0o?"},"content":{"rendered":"<p class=\"sidekick\">\u1ea2nh H\u01b0\u1edfng C\u1ee7a Ch\u1ea5t L\u1ecfng \u0110\u1ebfn H\u00ecnh D\u00e1ng Kh\u00ed \u0110\u1ed9ng H\u1ecdc: T\u00ecm hi\u1ec3u c\u00e1ch ch\u1ea5t l\u1ecfng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn thi\u1ebft k\u1ebf kh\u00ed \u0111\u1ed9ng h\u1ecdc v\u00e0 t\u1ed1i \u01b0u ho\u00e1 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/anh_huong_cua_chat_long_den_hinh_dang_khi_dong_hoc_nhu_the_nao.png\" alt=\"\u1ea2nh H\u01b0\u1edfng C\u1ee7a Ch\u1ea5t L\u1ecfng \u0110\u1ebfn H\u00ecnh D\u00e1ng Kh\u00ed \u0110\u1ed9ng H\u1ecdc Nh\u01b0 Th\u1ebf N\u00e0o?\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>\u1ea2nh H\u01b0\u1edfng C\u1ee7a Ch\u1ea5t L\u1ecfng \u0110\u1ebfn H\u00ecnh D\u00e1ng Kh\u00ed \u0110\u1ed9ng H\u1ecdc Nh\u01b0 Th\u1ebf N\u00e0o?<\/h2>\n<p>Ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t (thermal engineering) kh\u00f4ng ch\u1ec9 nghi\u00ean c\u1ee9u v\u1ec1 nhi\u1ec7t \u0111\u1ed9ng l\u1ef1c h\u1ecdc m\u00e0 c\u00f2n xem x\u00e9t s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa ch\u1ea5t l\u1ecfng v\u00e0 kh\u00f4ng kh\u00ed, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ea5t l\u1ecfng \u0111\u1ebfn h\u00ecnh d\u00e1ng kh\u00ed \u0111\u1ed9ng h\u1ecdc. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1ch m\u00e0 ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn h\u00ecnh d\u00e1ng kh\u00ed \u0111\u1ed9ng h\u1ecdc c\u1ee7a c\u00e1c v\u1eadt th\u1ec3.<\/p>\n<h2>Ch\u1ea5t L\u1ecfng v\u00e0 Kh\u00ed \u0110\u1ed9ng H\u1ecdc<\/h2>\n<p>Khi nh\u1eafc \u0111\u1ebfn kh\u00ed \u0111\u1ed9ng h\u1ecdc, ch\u00fang ta th\u01b0\u1eddng li\u00ean t\u01b0\u1edfng \u0111\u1ebfn thi\u1ebft k\u1ebf c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n v\u1eadn t\u1ea3i nh\u01b0 xe \u00f4 t\u00f4, m\u00e1y bay hay t\u00ean l\u1eeda. Kh\u00ed \u0111\u1ed9ng h\u1ecdc l\u00e0 ng\u00e0nh khoa h\u1ecdc nghi\u00ean c\u1ee9u v\u1ec1 c\u00e1ch kh\u00f4ng kh\u00ed v\u00e0 ch\u1ea5t l\u1ecfng ch\u1ea3y quanh c\u00e1c v\u1eadt th\u1ec3. C\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 h\u00ecnh d\u00e1ng, b\u1ec1 m\u1eb7t v\u00e0 t\u1ed1c \u0111\u1ed9 c\u1ee7a v\u1eadt th\u1ec3 \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1ch kh\u00f4ng kh\u00ed ho\u1eb7c ch\u1ea5t l\u1ecfng ch\u1ea3y qua ch\u00fang.<\/p>\n<h2>C\u00e1c Y\u1ebfu T\u1ed1 \u1ea2nh H\u01b0\u1edfng<\/h2>\n<ul>\n<li><b>\u0110\u1ed9 nh\u1edbt<\/b>: \u0110\u1ed9 nh\u1edbt c\u1ee7a ch\u1ea5t l\u1ecfng l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quan tr\u1ecdng nh\u1ea5t. N\u00f3 quy\u1ebft \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 \u201ctr\u01a1n\u201d c\u1ee7a d\u00f2ng ch\u1ea3y, ngh\u0129a l\u00e0 li\u1ec7u d\u00f2ng ch\u1ea3y c\u00f3 d\u1ec5 d\u00e0ng hay kh\u00f4ng. \u0110\u1ed9 nh\u1edbt cao l\u00e0m cho d\u00f2ng ch\u1ea3y tr\u1edf n\u00ean ch\u1eadm h\u01a1n v\u00e0 kh\u00f3 kh\u0103n h\u01a1n.<\/li>\n<li><b>T\u1ec9 l\u1ec7 gi\u1eefa l\u1ef1c qu\u00e1n t\u00ednh v\u00e0 l\u1ef1c nh\u1edbt<\/b>: Y\u1ebfu t\u1ed1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u di\u1ec5n b\u1eb1ng con s\u1ed1 Reynolds (Re). Reynolds = \\(\\frac{\\text{l\u1ef1c qu\u00e1n t\u00ednh}}{\\text{l\u1ef1c nh\u1edbt}}\\). Khi Re cao, l\u1ef1c qu\u00e1n t\u00ednh chi\u1ebfm \u01b0u th\u1ebf; khi Re th\u1ea5p, l\u1ef1c nh\u1edbt chi\u1ebfm \u01b0u th\u1ebf.<\/li>\n<li><b>B\u1ec1 m\u1eb7t v\u1eadt th\u1ec3<\/b>: B\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt th\u1ec3 ti\u1ebfp x\u00fac v\u1edbi ch\u1ea5t l\u1ecfng c\u0169ng \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn kh\u00ed \u0111\u1ed9ng h\u1ecdc. B\u1ec1 m\u1eb7t nh\u1eb5n s\u1ebd cho ph\u00e9p ch\u1ea5t l\u1ecfng ch\u1ea3y m\u01b0\u1ee3t m\u00e0 h\u01a1n so v\u1edbi b\u1ec1 m\u1eb7t g\u1ed3 gh\u1ec1.<\/li>\n<\/ul>\n<h2>M\u00f4 H\u00ecnh D\u00f2ng Ch\u1ea3y<\/h2>\n<p>Ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 ch\u1ea3y theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau xung quanh m\u1ed9t v\u1eadt th\u1ec3 t\u00f9y thu\u1ed9c v\u00e0o c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00e3 n\u00eau tr\u00ean:<\/p>\n<ol>\n<li><b>D\u00f2ng ch\u1ea3y t\u1ea7ng<\/b> (Laminar Flow): \u0110\u00e2y l\u00e0 ki\u1ec3u d\u00f2ng ch\u1ea3y m\u00e0 ch\u1ea5t l\u1ecfng ch\u1ea3y th\u00e0nh t\u1eebng l\u1edbp th\u1eb3ng h\u00e0ng nhau, kh\u00f4ng xen l\u1eabn, r\u1ea5t tr\u01a1n tru.<\/li>\n<li><b>D\u00f2ng ch\u1ea3y nhi\u1ec5u \u0111\u1ed9ng<\/b> (Turbulent Flow): Trong d\u00f2ng ch\u1ea3y n\u00e0y, ch\u1ea5t l\u1ecfng chuy\u1ec3n \u0111\u1ed9ng m\u1ed9t c\u00e1ch h\u1ed7n lo\u1ea1n, t\u1ea1o ra c\u00e1c v\u00f9ng xo\u00e1y v\u00e0 kh\u00e1 ph\u1ee9c t\u1ea1p.<\/li>\n<\/ol>\n<h2>\u1ee8ng D\u1ee5ng Th\u1ef1c Ti\u1ec5n<\/h2>\n<p>Ki\u1ebfn th\u1ee9c v\u1ec1 \u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ea5t l\u1ecfng \u0111\u1ebfn h\u00ecnh d\u00e1ng kh\u00ed \u0111\u1ed9ng h\u1ecdc \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong th\u1ef1c ti\u1ec5n:<\/p>\n<ul>\n<li><b>Thi\u1ebft k\u1ebf \u00f4 t\u00f4<\/b>: \u0110\u1ec3 gi\u1ea3m l\u1ef1c c\u1ea3n kh\u00f4ng kh\u00ed, c\u00e1c nh\u00e0 thi\u1ebft k\u1ebf \u00f4 t\u00f4 ch\u00fa tr\u1ecdng \u0111\u1ebfn vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a h\u00ecnh d\u00e1ng kh\u00ed \u0111\u1ed9ng h\u1ecdc c\u1ee7a xe.<\/li>\n<li><b>Thi\u1ebft k\u1ebf m\u00e1y bay<\/b>: \u0110\u1ed1i v\u1edbi m\u00e1y bay, vi\u1ec7c gi\u1ea3m l\u1ef1c c\u1ea3n kh\u00ed \u0111\u1ed9ng h\u1ecdc gi\u00fap ti\u1ebft ki\u1ec7m nhi\u00ean li\u1ec7u v\u00e0 t\u0103ng hi\u1ec7u su\u1ea5t bay.<\/li>\n<li><b>K\u1ef9 thu\u1eadt nhi\u1ec7t<\/b>: Trong c\u00e1c h\u1ec7 th\u1ed1ng t\u1ea3n nhi\u1ec7t, vi\u1ec7c thi\u1ebft k\u1ebf c\u00e1c b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac sao cho ch\u1ea5t l\u1ecfng ch\u1ea3y m\u01b0\u1ee3t m\u00e0 gi\u00fap t\u0103ng hi\u1ec7u su\u1ea5t t\u1ea3n nhi\u1ec7t.<\/li>\n<\/ul>\n<p>Hi\u1ec3u r\u00f5 \u0111\u01b0\u1ee3c \u1ea3nh h\u01b0\u1edfng c\u1ee7a ch\u1ea5t l\u1ecfng \u0111\u1ebfn h\u00ecnh d\u00e1ng kh\u00ed \u0111\u1ed9ng h\u1ecdc kh\u00f4ng ch\u1ec9 gi\u00fap t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng khi gi\u1ea3m b\u1edbt ti\u00eau hao n\u0103ng l\u01b0\u1ee3ng.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u1ea2nh H\u01b0\u1edfng C\u1ee7a Ch\u1ea5t L\u1ecfng \u0110\u1ebfn H\u00ecnh D\u00e1ng Kh\u00ed \u0110\u1ed9ng H\u1ecdc: T\u00ecm hi\u1ec3u c\u00e1ch ch\u1ea5t l\u1ecfng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn thi\u1ebft k\u1ebf kh\u00ed \u0111\u1ed9ng h\u1ecdc v\u00e0 t\u1ed1i \u01b0u ho\u00e1 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc.<\/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>\u1ea2nh H\u01b0\u1edfng C\u1ee7a Ch\u1ea5t L\u1ecfng \u0110\u1ebfn H\u00ecnh D\u00e1ng Kh\u00ed \u0110\u1ed9ng H\u1ecdc Nh\u01b0 Th\u1ebf N\u00e0o?<\/title>\n<meta name=\"description\" content=\"\u1ea2nh H\u01b0\u1edfng C\u1ee7a Ch\u1ea5t L\u1ecfng \u0110\u1ebfn H\u00ecnh D\u00e1ng Kh\u00ed \u0110\u1ed9ng H\u1ecdc: T\u00ecm hi\u1ec3u c\u00e1ch ch\u1ea5t l\u1ecfng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn thi\u1ebft k\u1ebf kh\u00ed \u0111\u1ed9ng h\u1ecdc v\u00e0 t\u1ed1i \u01b0u ho\u00e1 hi\u1ec7u su\u1ea5t c\u01a1 h\u1ecdc.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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