{"id":682522,"date":"2024-10-17T05:24:31","date_gmt":"2024-10-17T04:24:31","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=682522"},"modified":"2024-10-17T05:24:31","modified_gmt":"2024-10-17T04:24:31","slug":"9-ky-thuat-hinh-anh-dong-chay","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/9-ky-thuat-hinh-anh-dong-chay\/","title":{"rendered":"9 K\u1ef9 Thu\u1eadt H\u00ecnh \u1ea2nh D\u00f2ng Ch\u1ea3y"},"content":{"rendered":"

K\u1ef9 thu\u1eadt h\u00ecnh \u1ea3nh d\u00f2ng ch\u1ea3y l\u00e0 qu\u00e1 tr\u00ecnh ghi l\u1ea1i v\u00e0 ph\u00e2n t\u00edch s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ch\u1ea5t l\u1ecfng, gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng nhi\u1ec7t.<\/p>\n

\"9<\/p>\n

9 K\u1ef9 Thu\u1eadt H\u00ecnh \u1ea2nh D\u00f2ng Ch\u1ea3y<\/h2>\n

Trong l\u0129nh v\u1ef1c k\u1ef9 thu\u1eadt nhi\u1ec7t, vi\u1ec7c hi\u1ec3u r\u00f5 v\u00e0 ph\u00e2n t\u00edch d\u00f2ng ch\u1ea3y c\u1ee7a c\u00e1c ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 9 k\u1ef9 thu\u1eadt h\u00ecnh \u1ea3nh d\u00f2ng ch\u1ea3y ph\u1ed5 bi\u1ebfn gi\u00fap c\u00e1c k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 nghi\u00ean c\u1ee9u c\u00f3 th\u1ec3 quan s\u00e1t v\u00e0 \u0111o \u0111\u1ea1c c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a d\u00f2ng ch\u1ea3y m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n

<\/p>\n

  • Particle Image Velocimetry (PIV)<\/b><\/li>\n

    <\/u1><\/p>\n

    Particle Image Velocimetry (PIV) l\u00e0 k\u1ef9 thu\u1eadt d\u00f9ng \u0111\u1ec3 \u0111o t\u1ed1c \u0111\u1ed9 c\u1ee7a d\u00f2ng ch\u1ea3y nh\u1edd v\u00e0o vi\u1ec7c ch\u1ee5p \u1ea3nh c\u00e1c h\u1ea1t nh\u1ecf \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1n trong d\u00f2ng ch\u1ea3y. K\u1ef9 thu\u1eadt n\u00e0y cho ph\u00e9p thu th\u1eadp th\u00f4ng tin ba chi\u1ec1u v\u1ec1 v\u1eadn t\u1ed1c v\u00e0 ph\u01b0\u01a1ng h\u01b0\u1edbng c\u1ee7a ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.<\/p>\n

    <\/p>\n

  • Laser Doppler Anemometry (LDA)<\/b><\/li>\n

    <\/u1><\/p>\n

    Laser Doppler Anemometry (LDA) s\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng Doppler \u0111\u1ec3 \u0111o t\u1ed1c \u0111\u1ed9 c\u1ee7a d\u00f2ng ch\u1ea3y. K\u1ef9 thu\u1eadt n\u00e0y c\u1ea7n m\u1ed9t ngu\u1ed3n laser v\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e1t hi\u1ec7n \u00e1nh s\u00e1ng, cho ph\u00e9p thu th\u1eadp d\u1eef li\u1ec7u v\u1ec1 v\u1eadn t\u1ed1c d\u00f2ng ch\u1ea3y t\u1ea1i c\u00e1c \u0111i\u1ec3m c\u1ee5 th\u1ec3 m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i \u0111\u01b0a b\u1ea5t k\u1ef3 v\u1eadt li\u1ec7u g\u00ec v\u00e0o d\u00f2ng ch\u1ea3y.<\/p>\n

    <\/p>\n

  • Schlieren Imaging<\/b><\/li>\n

    <\/u1><\/p>\n

    K\u1ef9 thu\u1eadt Schlieren s\u1eed d\u1ee5ng s\u1ef1 kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng \u0111\u1ec3 quan s\u00e1t nh\u1eefng bi\u1ebfn \u0111\u1ed5i v\u1ec1 m\u1eadt \u0111\u1ed9 trong d\u00f2ng ch\u1ea3y. \u0110i\u1ec1u n\u00e0y r\u1ea5t h\u1eefu \u00edch cho vi\u1ec7c nghi\u00ean c\u1ee9u c\u00e1c d\u00f2ng ch\u1ea3y c\u00f3 t\u1ed1c \u0111\u1ed9 cao nh\u01b0 c\u00e1c lu\u1ed3ng kh\u00f4ng kh\u00ed xung quanh c\u00e1nh m\u00e1y bay hay trong \u0111\u1ed9ng c\u01a1 ph\u1ea3n l\u1ef1c.<\/p>\n

    <\/p>\n

  • Shadowgraphy<\/b><\/li>\n

    <\/u1><\/p>\n

    K\u1ef9 thu\u1eadt Shadowgraphy t\u01b0\u01a1ng t\u1ef1 nh\u01b0 Schlieren nh\u01b0ng \u0111\u01a1n gi\u1ea3n h\u01a1n v\u1ec1 m\u1eb7t thi\u1ebft l\u1eadp. N\u00f3 s\u1eed d\u1ee5ng b\u00f3ng c\u1ee7a d\u00f2ng ch\u1ea3y \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c v\u00f9ng c\u00f3 m\u1eadt \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i, th\u00edch h\u1ee3p cho vi\u1ec7c nghi\u00ean c\u1ee9u s\u1ef1 ph\u00e2n t\u1ea7ng nhi\u1ec7t v\u00e0 s\u1ef1 \u0111\u1ed1i l\u01b0u t\u1ef1 nhi\u00ean.<\/p>\n

    <\/p>\n

  • Planar Laser-Induced Fluorescence (PLIF)<\/b><\/li>\n

    <\/u1><\/p>\n

    Planar Laser-Induced Fluorescence (PLIF) s\u1eed d\u1ee5ng \u00e1nh s\u00e1ng laser \u0111\u1ec3 k\u00edch th\u00edch m\u1ed9t ch\u1ea5t ph\u00e1t quang \u0111\u01b0\u1ee3c tr\u1ed9n v\u00e0o d\u00f2ng ch\u1ea3y, cho ph\u00e9p quan s\u00e1t s\u1ef1 ph\u00e2n b\u1ed1 c\u1ee7a c\u00e1c th\u00f4ng s\u1ed1 kh\u00e1c nhau nh\u01b0 nhi\u1ec7t \u0111\u1ed9 v\u00e0 n\u1ed3ng \u0111\u1ed9 ch\u1ea5t trong d\u00f2ng ch\u1ea3y.<\/p>\n

    <\/p>\n

  • Infrared Thermography<\/b><\/li>\n

    <\/u1><\/p>\n

    Infrared Thermography s\u1eed d\u1ee5ng c\u00e1c camera h\u1ed3ng ngo\u1ea1i \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 tr\u00ean b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u ho\u1eb7c d\u00f2ng ch\u1ea3y. K\u1ef9 thu\u1eadt n\u00e0y r\u1ea5t h\u1eefu \u00edch trong vi\u1ec7c ph\u00e1t hi\u1ec7n c\u00e1c khu v\u1ef1c qu\u00e1 nhi\u1ec7t ho\u1eb7c kh\u00f4ng \u0111\u1ed3ng nh\u1ea5t v\u1ec1 nhi\u1ec7t \u0111\u1ed9.<\/p>\n

    <\/p>\n

  • Hot-wire Anemometry<\/b><\/li>\n

    <\/u1><\/p>\n

    Hot-wire Anemometry s\u1eed d\u1ee5ng m\u1ed9t d\u00e2y n\u00f3ng \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb v\u1eadt li\u1ec7u d\u1eabn nhi\u1ec7t. S\u1ef1 l\u00e0m m\u00e1t c\u1ee7a d\u00e2y n\u00f3ng do d\u00f2ng ch\u1ea3y \u0111i qua s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 suy ra t\u1ed1c \u0111\u1ed9 c\u1ee7a d\u00f2ng ch\u1ea3y, r\u1ea5t h\u1eefu \u00edch cho vi\u1ec7c \u0111o \u0111\u1ea1c v\u1eadn t\u1ed1c trong c\u00e1c d\u00f2ng ch\u1ea3y nhanh v\u00e0 h\u1ed7n lo\u1ea1n.<\/p>\n

    <\/p>\n

  • Magnetic Resonance Velocimetry (MRV)<\/b><\/li>\n

    <\/u1><\/p>\n

    Magnetic Resonance Velocimetry (MRV) s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng t\u1ef1 nh\u01b0 MRI (Magnetic Resonance Imaging) trong y h\u1ecdc \u0111\u1ec3 \u0111o v\u1eadn t\u1ed1c v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh kh\u00e1c c\u1ee7a d\u00f2ng ch\u1ea3y. MRV c\u00f3 th\u1ec3 cung c\u1ea5p h\u00ecnh \u1ea3nh ba chi\u1ec1u chi ti\u1ebft v\u1ec1 d\u00f2ng ch\u1ea3y m\u00e0 kh\u00f4ng c\u1ea7n ch\u1ea5t \u0111\u00e1nh d\u1ea5u.<\/p>\n

    <\/p>\n

  • Computational Fluid Dynamics (CFD)<\/b><\/li>\n

    <\/u1><\/p>\n

    Computational Fluid Dynamics (CFD) l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng d\u00f2ng ch\u1ea3y b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n s\u1ed1 h\u1ecdc. CFD cho ph\u00e9p ki\u1ec3m tra nh\u01b0ng kh\u00f4ng c\u1ea7n ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c th\u00ed nghi\u1ec7m th\u1ef1c t\u1ebf, r\u1ea5t h\u1eefu \u00edch trong vi\u1ec7c thi\u1ebft k\u1ebf v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 li\u00ean quan \u0111\u1ebfn d\u00f2ng ch\u1ea3y.<\/p>\n

    Tr\u00ean \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 k\u1ef9 thu\u1eadt h\u00ecnh \u1ea3nh d\u00f2ng ch\u1ea3y ph\u1ed5 bi\u1ebfn trong k\u1ef9 thu\u1eadt nhi\u1ec7t. M\u1ed7i k\u1ef9 thu\u1eadt c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 h\u1ea1n ch\u1ebf ri\u00eang, v\u00e0 vi\u1ec7c ch\u1ecdn k\u1ef9 thu\u1eadt ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ee5c ti\u00eau c\u1ee5 th\u1ec3 c\u1ee7a nghi\u00ean c\u1ee9u ho\u1eb7c \u1ee9ng d\u1ee5ng.<\/p>\n","protected":false},"excerpt":{"rendered":"

    K\u1ef9 thu\u1eadt h\u00ecnh \u1ea3nh d\u00f2ng ch\u1ea3y l\u00e0 qu\u00e1 tr\u00ecnh ghi l\u1ea1i v\u00e0 ph\u00e2n t\u00edch s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ch\u1ea5t l\u1ecfng, gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng nhi\u1ec7t.<\/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":"\n9 K\u1ef9 Thu\u1eadt H\u00ecnh \u1ea2nh D\u00f2ng Ch\u1ea3y<\/title>\n<meta name=\"description\" content=\"K\u1ef9 thu\u1eadt h\u00ecnh \u1ea3nh d\u00f2ng ch\u1ea3y l\u00e0 qu\u00e1 tr\u00ecnh ghi l\u1ea1i v\u00e0 ph\u00e2n t\u00edch s\u1ef1 chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a ch\u1ea5t l\u1ecfng, gi\u00fap c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t v\u00e0 t\u1ed1i \u01b0u h\u00f3a thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng nhi\u1ec7t.\" \/>\n<meta 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