{"id":708553,"date":"2024-07-29T11:24:57","date_gmt":"2024-07-29T10:24:57","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=708553"},"modified":"2024-07-29T11:24:57","modified_gmt":"2024-07-29T10:24:57","slug":"co-hoc-chat-long-hieu-ve-luc-keo","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/co-hoc-chat-long-hieu-ve-luc-keo\/","title":{"rendered":"C\u01a1 H\u1ecdc Ch\u1ea5t L\u1ecfng: Hi\u1ec3u V\u1ec1 L\u1ef1c K\u00e9o"},"content":{"rendered":"<p class=\"sidekick\">C\u01a1 H\u1ecdc Ch\u1ea5t L\u1ecfng: Hi\u1ec3u V\u1ec1 L\u1ef1c K\u00e9o gi\u1ea3i th\u00edch v\u1ec1 l\u1ef1c k\u00e9o trong ch\u1ea5t l\u1ecfng, c\u00e1ch t\u00ednh to\u00e1n v\u00e0 \u1ee9ng d\u1ee5ng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, gi\u00fap \u0111\u1ed9c gi\u1ea3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd n\u00e0y.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/co_hoc_chat_long_hieu_ve_luc_keo.png\" alt=\"C\u01a1 H\u1ecdc Ch\u1ea5t L\u1ecfng: Hi\u1ec3u V\u1ec1 L\u1ef1c K\u00e9o\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>C\u01a1 H\u1ecdc Ch\u1ea5t L\u1ecfng: Hi\u1ec3u V\u1ec1 L\u1ef1c K\u00e9o<\/h2>\n<p>C\u01a1 h\u1ecdc ch\u1ea5t l\u1ecfng l\u00e0 m\u1ed9t nh\u00e1nh quan tr\u1ecdng c\u1ee7a k\u1ef9 thu\u1eadt nhi\u1ec7t, g\u1ed3m vi\u1ec7c nghi\u00ean c\u1ee9u h\u00e0nh vi c\u1ee7a ch\u1ea5t l\u1ecfng v\u00e0 kh\u00ed trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau. M\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a c\u01a1 h\u1ecdc ch\u1ea5t l\u1ecfng l\u00e0 l\u1ef1c k\u00e9o, l\u1ef1c t\u00e1c \u0111\u1ed9ng l\u00ean m\u1ed9t v\u1eadt khi n\u00f3 di chuy\u1ec3n qua ch\u1ea5t l\u1ecfng. Hi\u1ec3u v\u1ec1 l\u1ef1c k\u00e9o kh\u00f4ng ch\u1ec9 c\u1ea7n thi\u1ebft cho c\u00e1c k\u1ef9 s\u01b0 m\u00e0 c\u00f2n c\u00f3 \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c.<\/p>\n<h3>1. L\u1ef1c K\u00e9o L\u00e0 G\u00ec?<\/h3>\n<p>L\u1ef1c k\u00e9o (drag force) l\u00e0 m\u1ed9t l\u1ef1c c\u1ea3n tr\u1edf chuy\u1ec3n \u0111\u1ed9ng c\u1ee7a v\u1eadt th\u1ec3 trong ch\u1ea5t l\u1ecfng (c\u00f3 th\u1ec3 l\u00e0 ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed). Khi m\u1ed9t v\u1eadt di chuy\u1ec3n qua ch\u1ea5t l\u1ecfng, n\u00f3 s\u1ebd ph\u1ea3i \u0111\u1ed1i m\u1eb7t v\u1edbi l\u1ef1c k\u00e9o t\u1eeb ph\u00eda ch\u1ea5t l\u1ecfng l\u00e0m gi\u1ea3m t\u1ed1c \u0111\u1ed9 c\u1ee7a n\u00f3. C\u00f4ng th\u1ee9c chung \u0111\u1ec3 t\u00ednh l\u1ef1c k\u00e9o l\u00e0:<\/p>\n<p><strong>F<sub>k\u00e9o<\/sub> = 1\/2 * C<sub>d<\/sub> * \u03c1 * A * v<sup>2<\/sup><\/strong><\/p>\n<ul>\n<li><strong>F<sub>k\u00e9o<\/sub><\/strong>: L\u1ef1c k\u00e9o<\/li>\n<li><strong>C<sub>d<\/sub><\/strong>: H\u1ec7 s\u1ed1 l\u1ef1c k\u00e9o<\/li>\n<li><strong>\u03c1<\/strong>: M\u1eadt \u0111\u1ed9 c\u1ee7a ch\u1ea5t l\u1ecfng<\/li>\n<li><strong>A<\/strong>: Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t \u0111\u1ed1i di\u1ec7n d\u00f2ng ch\u1ea3y<\/li>\n<li><strong>v<\/strong>: V\u1eadn t\u1ed1c c\u1ee7a v\u1eadt th\u1ec3<\/li>\n<\/ul>\n<h3>2. C\u00e1c Th\u00e0nh Ph\u1ea7n \u1ea2nh H\u01b0\u1edfng \u0110\u1ebfn L\u1ef1c K\u00e9o<\/h3>\n<ul>\n<li><strong>H\u1ec7 s\u1ed1 l\u1ef1c k\u00e9o (C<sub>d<\/sub>)<\/strong>: Ph\u1ee5 thu\u1ed9c v\u00e0o h\u00ecnh d\u1ea1ng v\u00e0 b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt th\u1ec3. H\u00ecnh d\u1ea1ng c\u00e0ng kh\u00ed \u0111\u1ed9ng h\u1ecdc (t\u1ed1i \u01b0u h\u00f3a cho vi\u1ec7c gi\u1ea3m l\u1ef1c c\u1ea3n) th\u00ec C<sub>d<\/sub> c\u00e0ng th\u1ea5p.<\/li>\n<li><strong>M\u1eadt \u0111\u1ed9 c\u1ee7a ch\u1ea5t l\u1ecfng (\u03c1)<\/strong>: Ch\u1ea5t l\u1ecfng c\u00f3 m\u1eadt \u0111\u1ed9 cao h\u01a1n (nh\u01b0 n\u01b0\u1edbc) t\u1ea1o ra l\u1ef1c k\u00e9o l\u1edbn h\u01a1n so v\u1edbi ch\u1ea5t l\u1ecfng c\u00f3 m\u1eadt \u0111\u1ed9 th\u1ea5p (kh\u00ed nh\u01b0 kh\u00f4ng kh\u00ed).<\/li>\n<li><strong>Di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t \u0111\u1ed1i di\u1ec7n d\u00f2ng ch\u1ea3y (A)<\/strong>: di\u1ec7n t\u00edch n\u00e0y c\u00e0ng l\u1edbn th\u00ec l\u1ef1c k\u00e9o c\u00e0ng t\u0103ng.<\/li>\n<li><strong>V\u1eadn t\u1ed1c (v)<\/strong>: L\u1ef1c k\u00e9o t\u0103ng t\u1ef7 l\u1ec7 b\u00ecnh ph\u01b0\u01a1ng v\u1edbi v\u1eadn t\u1ed1c, t\u1ee9c l\u00e0 khi v\u1eadn t\u1ed1c t\u0103ng g\u1ea5p \u0111\u00f4i, l\u1ef1c k\u00e9o s\u1ebd t\u0103ng g\u1ea5p b\u1ed1n l\u1ea7n.<\/li>\n<\/ul>\n<h3>3. \u1ee8ng D\u1ee5ng C\u1ee7a Vi\u1ec7c T\u00ednh To\u00e1n V\u00e0 Gi\u1ea3m Thi\u1ec3u L\u1ef1c K\u00e9o<\/h3>\n<p>Vi\u1ec7c hi\u1ec3u v\u00e0 t\u00ednh to\u00e1n l\u1ef1c k\u00e9o c\u00f3 r\u1ea5t nhi\u1ec1u \u1ee9ng d\u1ee5ng trong th\u1ef1c t\u1ebf:<\/p>\n<ul>\n<li><strong>Thi\u1ebft k\u1ebf \u00f4 t\u00f4 v\u00e0 m\u00e1y bay:<\/strong> L\u1ef1c k\u00e9o t\u00e1c \u0111\u1ed9ng l\u1edbn \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n n\u00e0y. Gi\u1ea3m l\u1ef1c k\u00e9o gi\u00fap ti\u1ebft ki\u1ec7m nhi\u00ean li\u1ec7u v\u00e0 c\u1ea3i thi\u1ec7n t\u1ed1c \u0111\u1ed9.<\/li>\n<li><strong>K\u1ef9 thu\u1eadt h\u00e0ng kh\u00f4ng:<\/strong> Thi\u1ebft k\u1ebf c\u00e1nh m\u00e1y bay ho\u1eb7c v\u1ecf t\u00e0u \u0111\u1ec3 t\u1ed1i \u01b0u l\u1ef1c k\u00e9o, gi\u00fap \u0111\u1ea1t \u0111\u01b0\u1ee3c h\u00e0nh tr\u00ecnh xa h\u01a1n v\u1edbi nhi\u00ean li\u1ec7u \u00edt h\u01a1n.<\/li>\n<li><strong>Th\u1ec3 thao:<\/strong> V\u1eadn \u0111\u1ed9ng vi\u00ean b\u01a1i l\u1ed9i ho\u1eb7c xe \u0111ua th\u01b0\u1eddng d\u00f9ng c\u00e1c thi\u1ebft k\u1ebf kh\u00ed \u0111\u1ed9ng h\u1ecdc \u0111\u1ec3 gi\u1ea3m l\u1ef1c k\u00e9o, n\u00e2ng cao th\u00e0nh t\u00edch c\u1ee7a h\u1ecd.<\/li>\n<\/ul>\n<h3>K\u1ebft Lu\u1eadn<\/h3>\n<p>Hi\u1ec3u v\u1ec1 l\u1ef1c k\u00e9o l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng trong c\u01a1 h\u1ecdc ch\u1ea5t l\u1ecfng v\u00e0 c\u00f3 \u1ee9ng d\u1ee5ng r\u1ea5t r\u1ed9ng r\u00e3i trong nhi\u1ec1u ng\u00e0nh c\u00f4ng nghi\u1ec7p. B\u1eb1ng c\u00e1ch t\u00ednh to\u00e1n v\u00e0 gi\u1ea3m thi\u1ec7u l\u1ef1c k\u00e9o, ch\u00fang ta c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t, ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 cao h\u01a1n trong nhi\u1ec1u vi\u1ec7c x\u00e2y d\u1ef1ng v\u00e0 thi\u1ebft k\u1ebf.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>C\u01a1 H\u1ecdc Ch\u1ea5t L\u1ecfng: Hi\u1ec3u V\u1ec1 L\u1ef1c K\u00e9o gi\u1ea3i th\u00edch v\u1ec1 l\u1ef1c k\u00e9o trong ch\u1ea5t l\u1ecfng, c\u00e1ch t\u00ednh to\u00e1n v\u00e0 \u1ee9ng d\u1ee5ng trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, gi\u00fap \u0111\u1ed9c gi\u1ea3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 nguy\u00ean l\u00fd n\u00e0y.<\/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 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