{"id":695928,"date":"2024-10-24T11:58:11","date_gmt":"2024-10-24T10:58:11","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=695928"},"modified":"2024-10-24T11:58:11","modified_gmt":"2024-10-24T10:58:11","slug":"mo-phong-khi-am-hoc","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/mo-phong-khi-am-hoc\/","title":{"rendered":"M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc"},"content":{"rendered":"<p class=\"sidekick\">M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc: C\u00f4ng c\u1ee5 quan tr\u1ecdng trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, gi\u00fap m\u00f4 ph\u1ecfng v\u00e0 ph\u00e2n t\u00edch \u00e2m thanh, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m ti\u1ebfng \u1ed3n.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/mo_phong_khi_am_hoc.png\" alt=\"M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc<\/h2>\n<p>M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p k\u1ef9 thu\u1eadt quan tr\u1ecdng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 m\u00f4 ph\u1ecfng \u0111\u1ec3 nghi\u00ean c\u1ee9u v\u00e0 ph\u00e2n t\u00edch s\u1ef1 truy\u1ec1n nhi\u1ec7t v\u00e0 \u0111\u1ed9ng l\u1ef1c h\u1ecdc ch\u1ea5t l\u1ecfng li\u00ean quan \u0111\u1ebfn \u00e2m h\u1ecdc. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u1ed1i \u01b0u h\u00f3a v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t, nh\u01b0 h\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed, \u0111\u1ed9ng c\u01a1 nhi\u1ec7t, v\u00e0 c\u00e1c thi\u1ebft b\u1ecb ph\u00e1t nhi\u1ec7t &#8211; \u00e2m h\u1ecdc.<\/p>\n<h2>Kh\u00ed \u00e2m h\u1ecdc v\u00e0 s\u1ef1 truy\u1ec1n nhi\u1ec7t<\/h2>\n<p>Kh\u00ed \u00e2m h\u1ecdc l\u00e0 l\u0129nh v\u1ef1c nghi\u00ean c\u1ee9u t\u01b0\u01a1ng t\u00e1c gi\u1eefa \u00e2m thanh v\u00e0 lu\u1ed3ng kh\u00ed. Khi \u00e2m thanh lan truy\u1ec1n qua kh\u00ed, n\u00f3 g\u00e2y ra s\u1ef1 bi\u1ebfn \u0111\u1ed5i \u00e1p su\u1ea5t v\u00e0 nhi\u1ec7t \u0111\u1ed9 nh\u1ea5t th\u1eddi, t\u1eeb \u0111\u00f3 t\u1ea1o ra s\u1ef1 truy\u1ec1n nhi\u1ec7t. Hi\u1ec3u bi\u1ebft v\u1ec1 kh\u00ed \u00e2m h\u1ecdc gi\u00fap ch\u00fang ta t\u1ed1i \u01b0u h\u00f3a c\u00e1c thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng \u00e2m thanh \u0111\u1ec3 l\u00e0m m\u00e1t ho\u1eb7c s\u01b0\u1edfi \u1ea5m.<\/p>\n<h2>Ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng<\/h2>\n<p>C\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc, nh\u01b0ng ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng c\u00e1c ph\u1ea7n m\u1ec1m CFD (Computational Fluid Dynamics). C\u00e1c ph\u1ea7n m\u1ec1m CFD cho ph\u00e9p gi\u1ea3 l\u1eadp t\u00ecnh tr\u1ea1ng kh\u00ed \u0111\u1ed9ng h\u1ecdc c\u1ee7a h\u1ec7 th\u1ed1ng b\u1eb1ng c\u00e1ch gi\u1ea3i c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh Navier-Stokes v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh truy\u1ec1n nhi\u1ec7t:<\/p>\n<ul>\n<li>Ph\u01b0\u01a1ng tr\u00ecnh li\u00ean t\u1ee5c: \\(\\frac{\\partial \\rho}{\\partial t} + \\nabla \\cdot (\\rho \\mathbf{u}) = 0\\)<\/li>\n<li>Ph\u01b0\u01a1ng tr\u00ecnh b\u1ea3o to\u00e0n \u0111\u1ed9ng l\u01b0\u1ee3ng: \\(\\rho \\left( \\frac{\\partial \\mathbf{u}}{\\partial t} + \\mathbf{u} \\cdot \\nabla \\mathbf{u} \\right) = &#8211; \\nabla p + \\mu \\nabla^2 \\mathbf{u} + \\rho \\mathbf{f}\\)<\/li>\n<li>Ph\u01b0\u01a1ng tr\u00ecnh n\u0103ng l\u01b0\u1ee3ng: \\(\\frac{\\partial}{\\partial t} (\\rho E) + \\nabla \\cdot (\\mathbf{u} (\\rho E + p)) = \\nabla \\cdot (k \\nabla T) + \\Phi\\)<\/li>\n<\/ul>\n<h2>\u1ee8ng d\u1ee5ng c\u1ee7a m\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc<\/h2>\n<p>M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc c\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n trong cu\u1ed9c s\u1ed1ng:<\/p>\n<ol>\n<li><b>H\u1ec7 th\u1ed1ng \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed:<\/b> Gi\u00fap t\u1ed1i \u01b0u h\u00f3a lu\u1ed3ng kh\u00ed v\u00e0 gi\u1ea3m ti\u1ebfng \u1ed3n t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng, t\u1eeb \u0111\u00f3 n\u00e2ng cao hi\u1ec7u su\u1ea5t v\u00e0 s\u1ef1 tho\u1ea3i m\u00e1i cho ng\u01b0\u1eddi s\u1eed d\u1ee5ng.<\/li>\n<li><b>\u0110\u1ed9ng c\u01a1 \u00f4 t\u00f4:<\/b> S\u1eed d\u1ee5ng m\u00f4 ph\u1ecfng \u0111\u1ec3 c\u1ea3i thi\u1ec7n h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t v\u00e0 gi\u1ea3m ti\u1ebfng \u1ed3n do \u0111\u1ed9ng c\u01a1 ph\u00e1t ra, g\u00f3p ph\u1ea7n n\u00e2ng cao hi\u1ec7u su\u1ea5t nhi\u00ean li\u1ec7u v\u00e0 tu\u1ed5i th\u1ecd c\u1ee7a \u0111\u1ed9ng c\u01a1.<\/li>\n<li><b>C\u00f4ng ngh\u1ec7 v\u0169 tr\u1ee5:<\/b> \u00c1p d\u1ee5ng trong thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng l\u00e0m m\u00e1t v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 cho t\u00e0u v\u0169 tr\u1ee5 v\u00e0 c\u00e1c thi\u1ebft b\u1ecb li\u00ean quan, nh\u1eb1m \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh trong \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t.<\/li>\n<\/ol>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd v\u00e0 hi\u1ec7u qu\u1ea3 trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, gi\u00fap c\u1ea3i thi\u1ec7n v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng nhi\u1ec7t v\u00e0 \u00e2m h\u1ecdc. Vi\u1ec7c \u00e1p d\u1ee5ng m\u00f4 ph\u1ecfng kh\u00f4ng ch\u1ec9 gi\u00fap ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00e0 th\u1eddi gian trong qu\u00e1 tr\u00ecnh nghi\u00ean c\u1ee9u m\u00e0 c\u00f2n m\u1edf ra nh\u1eefng kh\u1ea3 n\u0103ng m\u1edbi cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u00f4 ph\u1ecfng kh\u00ed \u00e2m h\u1ecdc: C\u00f4ng c\u1ee5 quan tr\u1ecdng trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, gi\u00fap m\u00f4 ph\u1ecfng v\u00e0 ph\u00e2n t\u00edch \u00e2m thanh, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m ti\u1ebfng \u1ed3n.<\/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\/ 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