{"id":695700,"date":"2024-07-27T16:36:57","date_gmt":"2024-07-27T15:36:57","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=695700"},"modified":"2024-07-27T16:36:57","modified_gmt":"2024-07-27T15:36:57","slug":"mo-phong-cfd-cua-qua-trinh-dot-chay","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/mo-phong-cfd-cua-qua-trinh-dot-chay\/","title":{"rendered":"M\u00f4 ph\u1ecfng CFD c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y"},"content":{"rendered":"<p class=\"sidekick\">M\u00f4 ph\u1ecfng CFD c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y gi\u00fap hi\u1ec3u r\u00f5 s\u1ef1 t\u01b0\u01a1ng t\u00e1c kh\u00ed \u0111\u1ed9ng h\u1ecdc v\u00e0 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t nhi\u1ec7t v\u00e0 gi\u1ea3m thi\u1ec3u kh\u00ed th\u1ea3i.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/mo_phong_cfd_cua_qua_trinh_dot_chay.png\" alt=\"M\u00f4 ph\u1ecfng CFD c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>M\u00f4 ph\u1ecfng CFD c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y<\/h2>\n<p>C\u00f4ng ngh\u1ec7 m\u00f4 ph\u1ecfng \u0111\u1ed9ng h\u1ecdc ch\u1ea5t l\u1ecfng (CFD &#8211; Computational Fluid Dynamics) \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t \u0111\u1ec3 nghi\u00ean c\u1ee9u v\u00e0 hi\u1ec3u r\u00f5 qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y. \u0110\u1ed1t ch\u00e1y l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng ph\u1ee9c t\u1ea1p, li\u00ean quan \u0111\u1ebfn ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc v\u00e0 t\u01b0\u01a1ng t\u00e1c gi\u1eefa ch\u1ea5t l\u1ecfng v\u00e0 nhi\u1ec7t \u0111\u1ed9. S\u1eed d\u1ee5ng CFD, c\u00e1c k\u1ef9 s\u01b0 v\u00e0 c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u c\u00f3 th\u1ec3 ph\u00e2n t\u00edch chi ti\u1ebft qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y, gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m thi\u1ec3u \u00f4 nhi\u1ec5m.<\/p>\n<h3>M\u00f4 ph\u1ecfng CFD l\u00e0 g\u00ec?<\/h3>\n<p>M\u00f4 ph\u1ecfng CFD l\u00e0 qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng c\u00e1c ph\u1ea7n m\u1ec1m m\u00e1y t\u00ednh \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 m\u00f4 ph\u1ecfng s\u1ef1 l\u01b0u th\u00f4ng c\u1ee7a ch\u1ea5t l\u1ecfng (bao g\u1ed3m c\u1ea3 kh\u00ed v\u00e0 ch\u1ea5t l\u1ecfng) v\u00e0 c\u00e1c t\u01b0\u01a1ng t\u00e1c nhi\u1ec7t \u0111\u1ed9ng h\u1ecdc. C\u00e1c m\u00f4 h\u00ecnh CFD cho ph\u00e9p m\u00f4 ph\u1ecfng qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y th\u00f4ng qua vi\u1ec7c gi\u1ea3i h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh Navier-Stokes, k\u1ebft h\u1ee3p v\u1edbi c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ed9ng h\u00f3a h\u1ecdc.<\/p>\n<ul>\n<li><b>Ph\u01b0\u01a1ng tr\u00ecnh Navier-Stokes:<\/b> M\u00f4 t\u1ea3 s\u1ef1 b\u1ea3o to\u00e0n \u0111\u1ed9ng l\u01b0\u1ee3ng, kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 n\u0103ng l\u01b0\u1ee3ng.<\/li>\n<li><b>Ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ed9ng h\u00f3a h\u1ecdc:<\/b> M\u00f4 t\u1ea3 t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc gi\u1eefa c\u00e1c ch\u1ea5t trong qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y.<\/li>\n<\/ul>\n<h3>C\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n m\u00f4 ph\u1ecfng CFD cho qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y<\/h3>\n<ol>\n<li><b>X\u00e2y d\u1ef1ng m\u00f4 h\u00ecnh h\u00ecnh h\u1ecdc:<\/b> Tr\u01b0\u1edbc ti\u00ean, m\u00f4 h\u00ecnh h\u00f3a h\u00ecnh h\u1ecdc c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u1ed1t ch\u00e1y c\u1ea7n \u0111\u01b0\u1ee3c t\u1ea1o ra. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 bao g\u1ed3m vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c bu\u1ed3ng \u0111\u1ed1t, v\u00f2i phun nhi\u00ean li\u1ec7u, v\u00e0 c\u00e1c k\u00eanh d\u1eabn kh\u00ed.<\/li>\n<li><b>T\u1ea1o l\u01b0\u1edbi:<\/b> M\u00f4 h\u00ecnh h\u00ecnh h\u1ecdc sau \u0111\u00f3 \u0111\u01b0\u1ee3c ph\u00e2n chia th\u00e0nh c\u00e1c \u00f4 l\u01b0\u1edbi nh\u1ecf (mesh) \u0111\u1ec3 gi\u1ea3i c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh CFD. Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 t\u1ea1o l\u01b0\u1edbi (meshing) v\u00e0 \u0111\u1ed9 chi ti\u1ebft c\u1ee7a l\u01b0\u1edbi \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a k\u1ebft qu\u1ea3.<\/li>\n<li><b>Thi\u1ebft l\u1eadp \u0111i\u1ec1u ki\u1ec7n bi\u00ean:<\/b> C\u00e1c \u0111i\u1ec1u ki\u1ec7n ban \u0111\u1ea7u v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n bi\u00ean (boundary conditions) ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m t\u1ed1c \u0111\u1ed9 v\u00e0 \u00e1p su\u1ea5t d\u00f2ng ch\u1ea3y, nhi\u1ec7t \u0111\u1ed9, v\u00e0 n\u1ed3ng \u0111\u1ed9 c\u1ee7a c\u00e1c ch\u1ea5t tham gia \u0111\u1ed1t ch\u00e1y.<\/li>\n<li><b>Gi\u1ea3i h\u1ec7 ph\u01b0\u01a1ng tr\u00ecnh:<\/b> S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m CFD \u0111\u1ec3 gi\u1ea3i c\u00e1c ph\u01b0\u01a1ng tr\u00ecnh Navier-Stokes v\u00e0 ph\u01b0\u01a1ng tr\u00ecnh \u0111\u1ed9ng h\u00f3a h\u1ecdc. Qu\u00e1 tr\u00ecnh n\u00e0y th\u01b0\u1eddng y\u00eau c\u1ea7u r\u1ea5t nhi\u1ec1u th\u1eddi gian v\u00e0 t\u00e0i nguy\u00ean m\u00e1y t\u00ednh.<\/li>\n<li><b>Ph\u00e2n t\u00edch k\u1ebft qu\u1ea3:<\/b> K\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng c\u1ea7n \u0111\u01b0\u1ee3c ph\u00e2n t\u00edch \u0111\u1ec3 hi\u1ec3u r\u00f5 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y, ch\u1eb3ng h\u1ea1n nh\u01b0 ph\u00e2n b\u1ed1 nhi\u1ec7t \u0111\u1ed9, t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng, v\u00e0 s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c ch\u1ea5t \u00f4 nhi\u1ec5m.<\/li>\n<\/ol>\n<h3>\u1ee8ng d\u1ee5ng c\u1ee7a m\u00f4 ph\u1ecfng CFD trong qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y<\/h3>\n<ul>\n<li><b>C\u1ea3i thi\u1ec7n thi\u1ebft k\u1ebf bu\u1ed3ng \u0111\u1ed1t:<\/b> C\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng k\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng \u0111\u1ec3 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf bu\u1ed3ng \u0111\u1ed1t, n\u00e2ng cao hi\u1ec7u su\u1ea5t v\u00e0 gi\u1ea3m thi\u1ec3u l\u01b0\u1ee3ng nhi\u00ean li\u1ec7u ti\u00eau th\u1ee5.<\/li>\n<li><b>Gi\u1ea3m thi\u1ec3u \u00f4 nhi\u1ec5m kh\u00ed th\u1ea3i:<\/b> CFD c\u00f3 th\u1ec3 gi\u00fap hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u01a1 ch\u1ebf h\u00ecnh th\u00e0nh c\u00e1c ch\u1ea5t c\u00f3 h\u1ea1i nh\u01b0 NO<sub>x<\/sub>, CO, v\u00e0 PM, t\u1eeb \u0111\u00f3 \u0111\u1ec1 ra c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m so\u00e1t hi\u1ec7u qu\u1ea3.<\/li>\n<li><b>Nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n nhi\u00ean li\u1ec7u m\u1edbi:<\/b> Qu\u00e1 tr\u00ecnh m\u00f4 ph\u1ecfng c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 nghi\u00ean c\u1ee9u s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 t\u00ednh ch\u1ea5t \u0111\u1ed1t ch\u00e1y c\u1ee7a c\u00e1c lo\u1ea1i nhi\u00ean li\u1ec7u m\u1edbi.<\/li>\n<\/ul>\n<p>M\u00f4 ph\u1ecfng CFD \u0111\u00f3ng vai tr\u00f2 kh\u00f4ng th\u1ec3 thi\u1ebfu trong nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n c\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ed1t ch\u00e1y hi\u1ec7n \u0111\u1ea1i. N\u00f3 kh\u00f4ng ch\u1ec9 gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t m\u00e0 c\u00f2n g\u00f3p ph\u1ea7n quan tr\u1ecdng v\u00e0o vi\u1ec7c b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng b\u1eb1ng c\u00e1ch gi\u1ea3m thi\u1ec3u kh\u00ed th\u1ea3i v\u00e0 ti\u1ebft ki\u1ec7m t\u00e0i nguy\u00ean.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>M\u00f4 ph\u1ecfng CFD c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u1ed1t ch\u00e1y gi\u00fap hi\u1ec3u r\u00f5 s\u1ef1 t\u01b0\u01a1ng t\u00e1c kh\u00ed \u0111\u1ed9ng h\u1ecdc v\u00e0 ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t nhi\u1ec7t v\u00e0 gi\u1ea3m thi\u1ec3u kh\u00ed th\u1ea3i.<\/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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