{"id":743676,"date":"2024-10-23T07:33:03","date_gmt":"2024-10-23T06:33:03","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=743676"},"modified":"2024-10-23T07:33:03","modified_gmt":"2024-10-23T06:33:03","slug":"%e5%a1%ab%e5%85%85%e5%ba%8a%e4%b8%ad%e7%9a%84%e7%83%ad%e4%bc%a0%e9%80%92","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/zh-hans\/%e5%a1%ab%e5%85%85%e5%ba%8a%e4%b8%ad%e7%9a%84%e7%83%ad%e4%bc%a0%e9%80%92\/","title":{"rendered":"\u586b\u5145\u5e8a\u4e2d\u7684\u70ed\u4f20\u9012"},"content":{"rendered":"<p class=\"sidekick\">\u586b\u5145\u5e8a\u4e2d\u7684\u70ed\u4f20\u9012\uff1a\u4ecb\u7ecd\u586b\u5145\u5e8a\u5728\u70ed\u5de5\u7a0b\u4e2d\u7684\u5e94\u7528\uff0c\u89e3\u6790\u70ed\u91cf\u5982\u4f55\u901a\u8fc7\u9897\u7c92\u95f4\u4f20\u9012\uff0c\u4f18\u5316\u70ed\u4ea4\u6362\u6548\u7387\u7684\u65b9\u6cd5\u53ca\u5b9e\u9645\u6848\u4f8b\u5c55\u793a\u3002<\/p>\n<p><img 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q = -k \\frac{\\Delta T}{\\Delta x} \\)<\/p>\n<p>\u5176\u4e2d\uff0cq \u662f\u70ed\u6d41\u5bc6\u5ea6\uff0ck \u662f\u5bfc\u70ed\u7cfb\u6570\uff0c\u0394T \u662f\u6e29\u5dee\uff0c\u0394x \u662f\u8ddd\u79bb\u3002<\/p>\n<h2>\u5bf9\u6d41<\/h2>\n<p>\u5bf9\u6d41\u662f\u6d41\u4f53\u5728\u9897\u7c92\u95f4\u6d41\u52a8\uff0c\u901a\u8fc7\u5f3a\u5236\u5bf9\u6d41\u6216\u81ea\u7136\u5bf9\u6d41\u4f20\u9012\u70ed\u91cf\u3002\u5bf9\u6d41\u7684\u4f20\u70ed\u6548\u7387\u4e0e\u6d41\u4f53\u7684\u6027\u8d28\u3001\u6d41\u901f\u4ee5\u53ca\u5e8a\u5c42\u7ed3\u6784\u6709\u5173\u3002\u5bf9\u6d41\u4f20\u70ed\u53ef\u4ee5\u901a\u8fc7\u52aa\u585e\u5c14\u6570\uff08Nusselt number\uff0cNu\uff09\u8ba1\u7b97\uff0c\u5176\u516c\u5f0f\u4e3a\uff1a<\/p>\n<p>\\( Nu = \\frac{hL}{k} \\)<\/p>\n<p>\u5176\u4e2d\uff0ch \u662f\u5bf9\u6d41\u6362\u70ed\u7cfb\u6570\uff0cL \u662f\u7279\u5f81\u957f\u5ea6\uff0ck \u662f\u6d41\u4f53\u7684\u5bfc\u70ed\u7cfb\u6570\u3002<\/p>\n<h2>\u8f90\u5c04<\/h2>\n<p>\u8f90\u5c04\u662f\u70ed\u91cf\u901a\u8fc7\u7535\u78c1\u6ce2\u4f20\u9012\u3002\u5728\u9ad8\u6e29\u6761\u4ef6\u4e0b\uff0c\u8fd9\u79cd\u65b9\u5f0f\u5c24\u5176\u91cd\u8981\u3002\u8f90\u5c04\u4f20\u70ed\u8ba1\u7b97\u53ef\u4ee5\u7528 Stefan-Boltzmann \u5b9a\u5f8b\u8868\u793a\uff1a<\/p>\n<p>\\( q = \\sigma T^4 \\)<\/p>\n<p>\u5176\u4e2d\uff0c\u03c3 \u662f Stephan-Boltzmann \u5e38\u6570\uff0cT \u662f\u7edd\u5bf9\u6e29\u5ea6\u3002<\/p>\n<h2>\u5f71\u54cd\u56e0\u7d20<\/h2>\n<p>\u586b\u5145\u5e8a\u4e2d\u7684\u70ed\u4f20\u9012\u53d7\u591a\u79cd\u56e0\u7d20\u5f71\u54cd\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u9897\u7c92\u7684\u6750\u8d28\u548c\u5927\u5c0f\uff1a\u4e0d\u540c\u6750\u8d28\u548c\u5927\u5c0f\u7684\u9897\u7c92\u5bfc\u70ed\u7cfb\u6570\u4e0d\u540c\u3002<\/li>\n<li>\u9897\u7c92\u7684\u5f62\u72b6\uff1a\u5f62\u72b6\u590d\u6742\u7684\u9897\u7c92\u6bd4\u7b80\u5355\u5f62\u72b6\u7684\u9897\u7c92\u63d0\u4f9b\u66f4\u591a\u7684\u63a5\u89e6\u70b9\u3002<\/li>\n<li>\u6d41\u4f53\u6027\u8d28\uff1a\u6d41\u4f53\u7684\u70ed\u5bfc\u7387\u3001\u6d41\u901f\u3001\u7c98\u5ea6\u7b49\u5f71\u54cd\u5bf9\u6d41\u4f20\u70ed\u3002<\/li>\n<li>\u6d41\u4f53\u6d41\u52a8\u65b9\u5f0f\uff1a\u5c42\u6d41\u6216\u6e4d\u6d41\u4f1a\u6539\u53d8\u5bf9\u6d41\u6362\u70ed\u7cfb\u6570\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u5b9e\u4f8b<\/h2>\n<p>\u586b\u5145\u5e8a\u5e7f\u6cdb\u5e94\u7528\u4e8e\u5316\u5de5\u3001\u73af\u4fdd\u548c\u80fd\u6e90\u9886\u57df\u3002\u4f8b\u5982\uff0c\u5728\u5316\u5b66\u53cd\u5e94\u5668\u4e2d\uff0c\u53cd\u5e94\u6c14\u4f53\u901a\u8fc7\u586b\u5145\u5e8a\u8fdb\u884c\u50ac\u5316\u53cd\u5e94\uff0c\u63d0\u9ad8\u4ea7\u7269\u6536\u7387\u3002\u5728\u7a7a\u6c14\u51c0\u5316\u7cfb\u7edf\u4e2d\uff0c\u586b\u5145\u5e8a\u4e2d\u7684\u5438\u9644\u5242\u9897\u7c92\u53ef\u4ee5\u6355\u6349\u548c\u5206\u89e3\u6709\u5bb3\u6c14\u4f53\u3002<\/p>\n<p>\u603b\u4e4b\uff0c\u586b\u5145\u5e8a\u4e2d\u7684\u70ed\u4f20\u9012\u662f\u4e00\u4e2a\u590d\u6742\u7684\u8fc7\u7a0b\uff0c\u4f46\u901a\u8fc7\u7406\u89e3\u5176\u57fa\u672c\u673a\u5236\u548c\u5f71\u54cd\u56e0\u7d20\uff0c\u53ef\u4ee5\u4f18\u5316\u5176\u8bbe\u8ba1\u548c\u64cd\u4f5c\uff0c\u4ece\u800c\u63d0\u9ad8\u5de5\u4e1a\u8fc7\u7a0b\u7684\u6548\u7387\u548c\u6548\u679c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u586b\u5145\u5e8a\u4e2d\u7684\u70ed\u4f20\u9012\uff1a\u4ecb\u7ecd\u586b\u5145\u5e8a\u5728\u70ed\u5de5\u7a0b\u4e2d\u7684\u5e94\u7528\uff0c\u89e3\u6790\u70ed\u91cf\u5982\u4f55\u901a\u8fc7\u9897\u7c92\u95f4\u4f20\u9012\uff0c\u4f18\u5316\u70ed\u4ea4\u6362\u6548\u7387\u7684\u65b9\u6cd5\u53ca\u5b9e\u9645\u6848\u4f8b\u5c55\u793a\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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