{"id":743350,"date":"2024-08-31T23:13:15","date_gmt":"2024-08-31T22:13:15","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=743350"},"modified":"2024-08-31T23:13:15","modified_gmt":"2024-08-31T22:13:15","slug":"%e5%b1%82%e6%b5%81%e4%bc%a0%e7%83%ad%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/zh-hans\/%e5%b1%82%e6%b5%81%e4%bc%a0%e7%83%ad%e8%a7%a3%e6%9e%90\/","title":{"rendered":"\u5c42\u6d41\u4f20\u70ed\u89e3\u6790"},"content":{"rendered":"<p class=\"sidekick\">\u5c42\u6d41\u4f20\u70ed\u89e3\u6790\uff1a\u6df1\u5165\u63a2\u8ba8\u5c42\u6d41\u6761\u4ef6\u4e0b\u7684\u4f20\u70ed\u673a\u5236\u548c\u8ba1\u7b97\u65b9\u6cd5\uff0c\u4e86\u89e3\u5176\u5728\u5de5\u7a0b\u5e94\u7528\u4e2d\u7684\u91cd\u8981\u6027\uff0c\u5e2e\u52a9\u8bfb\u8005\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u548c\u5b9e\u9645\u5e94\u7528\u3002<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/\u5c42\u6d41\u4f20\u70ed\u89e3\u6790.png\" alt=\"\u5c42\u6d41\u4f20\u70ed\u89e3\u6790\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>\u5c42\u6d41\u4f20\u70ed\u89e3\u6790<\/h2>\n<p>\u5c42\u6d41\u4f20\u70ed\u662f\u70ed\u5de5\u7a0b\u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u8bfe\u9898\uff0c\u6db5\u76d6\u4e86\u5728\u6d41\u4f53\u4e2d\u70ed\u91cf\u5982\u4f55\u4f20\u9012\u7684\u57fa\u672c\u7406\u8bba\u3002\u901a\u8fc7\u7406\u89e3\u5c42\u6d41\u4f20\u70ed\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u8bbe\u8ba1\u548c\u4f18\u5316\u70ed\u4ea4\u6362\u8bbe\u5907\uff0c\u5982\u6563\u70ed\u5668\u548c\u51b7\u5374\u5668\u3002<\/p>\n<h2>\u5c42\u6d41\u4e0e\u6e4d\u6d41\u7684\u533a\u522b<\/h2>\n<p>\u5c42\u6d41\u548c\u6e4d\u6d41\u662f\u6d41\u4f53\u6d41\u52a8\u7684\u4e24\u79cd\u4e3b\u8981\u5f62\u5f0f\u3002\u5c42\u6d41\u662f\u4e00\u79cd\u5e73\u6ed1\u3001\u6709\u5e8f\u7684\u6d41\u52a8\u65b9\u5f0f\uff0c\u6d41\u4f53\u5728\u5c42\u4e4b\u95f4\u4e0d\u6df7\u5408\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u6e4d\u6d41\u5219\u662f\u65e0\u5e8f\u4e14\u6df7\u4e71\u7684\uff0c\u6d41\u4f53\u5728\u6d41\u52a8\u8fc7\u7a0b\u4e2d\u4f1a\u6df7\u5408\u3002<\/p>\n<ul>\n<li>\u5c42\u6d41\uff1a\u96f7\u8bfa\u6570(Re) < 2000<\/li>\n<li>\u6e4d\u6d41\uff1a\u96f7\u8bfa\u6570(Re) > 4000<\/li>\n<\/ul>\n<p>\u5728\u5de5\u7a0b\u5e94\u7528\u4e2d\uff0c\u5c42\u6d41\u901a\u5e38\u53d1\u751f\u5728\u4f4e\u901f\u3001\u5c0f\u5c3a\u5bf8\u7684\u6d41\u9053\u4e2d\u3002\u4f8b\u5982\uff0c\u8840\u6db2\u5728\u4eba\u4f53\u5fae\u5c0f\u8840\u7ba1\u4e2d\u7684\u6d41\u52a8\u5c31\u662f\u4e00\u79cd\u5c42\u6d41\u73b0\u8c61\u3002<\/p>\n<h2>\u5c42\u6d41\u4f20\u70ed\u7684\u57fa\u672c\u65b9\u7a0b<\/h2>\n<p>\u5728\u5c42\u6d41\u6761\u4ef6\u4e0b\uff0c\u4f20\u70ed\u53ef\u4ee5\u901a\u8fc7\u5bfc\u70ed\u65b9\u7a0b\u6765\u63cf\u8ff0\u3002\u5bfc\u70ed\u65b9\u7a0b\u7684\u57fa\u672c\u5f62\u5f0f\u4e3a\uff1a<\/p>\n<p style=\"text-align: center;\">q = -k * A * (dT\/dx)<\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>q\uff1a\u70ed\u4f20\u5bfc\u7387<\/li>\n<li>k\uff1a\u5bfc\u70ed\u7cfb\u6570<\/li>\n<li>A\uff1a\u622a\u9762\u79ef<\/li>\n<li>dT\/dx\uff1a\u6e29\u5ea6\u68af\u5ea6<\/li>\n<\/ul>\n<h2>\u5c42\u6d41\u7ba1\u5185\u4f20\u70ed<\/h2>\n<p>\u5728\u5706\u5f62\u7ba1\u9053\u4e2d\uff0c\u5c42\u6d41\u4f20\u70ed\u7684\u5e38\u7528\u516c\u5f0f\u662f\u52aa\u585e\u5c14(Nusselt)\u6570\u516c\u5f0f\u3002\u5bf9\u4e8e\u6052\u5b9a\u58c1\u6e29\u7684\u6d41\u52a8\uff0c\u52aa\u585e\u5c14\u6570\u53ef\u4ee5\u8868\u793a\u4e3a\uff1a<\/p>\n<p style=\"text-align: center;\">Nu = 3.66<\/p>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u52aa\u585e\u5c14\u6570\u662f\u4e00\u4e2a\u5e38\u6570\u3002\u8fd9\u610f\u5473\u7740\u5bfc\u70ed\u7684\u6548\u7387\u53ef\u4ee5\u9884\u6d4b\uff0c\u5f53\u6d41\u4f53\u6761\u4ef6\u7a33\u5b9a\u4e14\u7ba1\u58c1\u6e29\u5ea6\u6052\u5b9a\u65f6\u3002<\/p>\n<h2>\u5c42\u6d41\u4e0b\u7684\u6362\u70ed\u7cfb\u6570<\/h2>\n<p>\u6362\u70ed\u7cfb\u6570\u662f\u53e6\u4e00\u91cd\u8981\u7684\u53c2\u6570\uff0c\u53ef\u4ee5\u901a\u8fc7\u5982\u4e0b\u516c\u5f0f\u8ba1\u7b97\uff1a<\/p>\n<p style=\"text-align: center;\">h = \\frac{Nu * k}{D}<\/p>\n<p>\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li>h\uff1a\u6362\u70ed\u7cfb\u6570<\/li>\n<li>Nu\uff1a\u52aa\u585e\u5c14\u6570<\/li>\n<li>k\uff1a\u6d41\u4f53\u5bfc\u70ed\u7cfb\u6570<\/li>\n<li>D\uff1a\u7ba1\u9053\u76f4\u5f84<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u4e3e\u4f8b<\/h2>\n<ol>\n<li>\n<p><strong>\u51b7\u5374\u7cfb\u7edf<\/strong>\uff1a\u5728\u8bb8\u591a\u7535\u5b50\u8bbe\u5907\u4e2d\uff0c\u5c42\u6d41\u4f20\u70ed\u7528\u4e8e\u6563\u70ed\u8bbe\u8ba1\uff0c\u5982\u5728\u82af\u7247\u548c\u51b7\u5374\u7247\u4e4b\u95f4\u7684\u5bfc\u70ed\u3002<\/p>\n<\/li>\n<li>\n<p><strong>\u70ed\u4ea4\u6362\u5668<\/strong>\uff1a\u5728\u5de5\u4e1a\u5e94\u7528\u4e2d\uff0c\u5c42\u6d41\u4f20\u70ed\u7528\u4e8e\u8bbe\u8ba1\u9ad8\u6548\u7684\u70ed\u4ea4\u6362\u8bbe\u5907\uff0c\u4ee5\u4fdd\u6301\u8fc7\u7a0b\u7684\u7a33\u5b9a\u6027\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u901a\u8fc7\u7406\u89e3\u548c\u5e94\u7528\u5c42\u6d41\u4f20\u70ed\u7684\u7406\u8bba\uff0c\u6211\u4eec\u53ef\u4ee5\u4f18\u5316\u5404\u79cd\u70ed\u4f20\u5bfc\u8fc7\u7a0b\uff0c\u63d0\u9ad8\u8bbe\u5907\u7684\u6548\u7387\u548c\u7a33\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c42\u6d41\u4f20\u70ed\u89e3\u6790\uff1a\u6df1\u5165\u63a2\u8ba8\u5c42\u6d41\u6761\u4ef6\u4e0b\u7684\u4f20\u70ed\u673a\u5236\u548c\u8ba1\u7b97\u65b9\u6cd5\uff0c\u4e86\u89e3\u5176\u5728\u5de5\u7a0b\u5e94\u7528\u4e2d\u7684\u91cd\u8981\u6027\uff0c\u5e2e\u52a9\u8bfb\u8005\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u548c\u5b9e\u9645\u5e94\u7528\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[134],"tags":[],"yoast_head":"<!-- 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