{"id":725962,"date":"2024-10-27T01:00:00","date_gmt":"2024-10-27T00:00:00","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=725962"},"modified":"2024-10-27T01:00:00","modified_gmt":"2024-10-27T00:00:00","slug":"5%e7%a7%8d%e7%8e%af%e5%a2%83%e9%a3%8e%e6%b5%81%e7%a0%94%e7%a9%b6%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/zh-hans\/5%e7%a7%8d%e7%8e%af%e5%a2%83%e9%a3%8e%e6%b5%81%e7%a0%94%e7%a9%b6%e7%b1%bb%e5%9e%8b\/","title":{"rendered":"5\u79cd\u73af\u5883\u98ce\u6d41\u7814\u7a76\u7c7b\u578b"},"content":{"rendered":"

\u73af\u5883\u98ce\u6d41\u7814\u7a76\u65b9\u6cd5\uff0c\u901a\u8fc7\u5206\u6790\u4e0d\u540c\u98ce\u6d41\u7c7b\u578b\u5982\u81ea\u7136\u5bf9\u6d41\u3001\u5f3a\u5236\u5bf9\u6d41\u3001\u6e4d\u6d41\u7b49\uff0c\u5e2e\u52a9\u7406\u89e3\u548c\u4f18\u5316\u70ed\u4ea4\u6362\u53ca\u8282\u80fd\u6548\u679c\uff0c\u63d0\u5347\u5de5\u7a0b\u6548\u7387\u3002<\/p>\n

\"5\u79cd\u73af\u5883\u98ce\u6d41\u7814\u7a76\u7c7b\u578b\"<\/p>\n

5\u79cd\u73af\u5883\u98ce\u6d41\u7814\u7a76\u7c7b\u578b<\/h2>\n

\u5728\u70ed\u5de5\u5b66\u4e2d\uff0c\u73af\u5883\u98ce\u6d41\u7814\u7a76\u662f\u7406\u89e3\u5e76\u4f18\u5316\u4e0e\u81ea\u7136\u73af\u5883\u4ea4\u4e92\u7684\u5173\u952e\u3002\u672c\u7bc7\u6587\u7ae0\u5c06\u4ecb\u7ecd5\u79cd\u5e38\u89c1\u7684\u73af\u5883\u98ce\u6d41\u7814\u7a76\u7c7b\u578b\uff0c\u5e2e\u52a9\u5927\u5bb6\u66f4\u597d\u5730\u7406\u89e3\u8fd9\u4e9b\u590d\u6742\u4f46\u91cd\u8981\u7684\u73b0\u8c61\u3002<\/p>\n

    \n
  1. \n

    \u81ea\u7136\u5bf9\u6d41<\/h2>\n

    \u81ea\u7136\u5bf9\u6d41\u662f\u6307\u7531\u4e8e\u6e29\u5ea6\u5dee\u5f02\u5f15\u8d77\u7684\u6d41\u4f53\u8fd0\u52a8\u3002\u4f8b\u5982\uff0c\u70ed\u7a7a\u6c14\u4e0a\u5347\uff0c\u51b7\u7a7a\u6c14\u4e0b\u964d\uff0c\u5f62\u6210\u81ea\u7136\u5bf9\u6d41\u3002\u81ea\u7136\u5bf9\u6d41\u7684\u7814\u7a76\u6db5\u76d6\u4e86\u5efa\u7b51\u70ed\u7ba1\u7406\u3001\u6c14\u5019\u63a7\u5236\u7b49\u591a\u4e2a\u9886\u57df\u3002<\/p>\n

    \u516c\u5f0f\u8868\u793a\u81ea\u7136\u5bf9\u6d41\u7684\u9a71\u52a8\u529b\uff1a
    \n Gr = \\frac{\\beta g \\Delta T L^3}{\\nu^2}
    \n
    \u8fd9\u91cc\uff0cGr\u662fGrashof\u6570\uff0c\u03b2\u662f\u4f53\u79ef\u81a8\u80c0\u7cfb\u6570\uff0cg\u662f\u91cd\u529b\u52a0\u901f\u5ea6\uff0c\u0394T\u662f\u6e29\u5dee\uff0cL\u662f\u7279\u5f81\u957f\u5ea6\uff0c\u03bd\u662f\u8fd0\u52a8\u9ecf\u5ea6\u3002<\/p>\n<\/li>\n

  2. \n

    \u5f3a\u8feb\u5bf9\u6d41<\/h2>\n

    \u5f3a\u8feb\u5bf9\u6d41\u6d89\u53ca\u5916\u90e8\u529b\u91cf\u5f15\u8d77\u7684\u6d41\u4f53\u6d41\u52a8\uff0c\u4f8b\u5982\u98ce\u6247\u6216\u6cf5\u3002\u5f3a\u8feb\u5bf9\u6d41\u5728\u7535\u5b50\u8bbe\u5907\u51b7\u5374\u3001\u5de5\u4e1a\u5236\u51b7\u7b49\u9886\u57df\u5e94\u7528\u5e7f\u6cdb\u3002<\/p>\n

    \u63cf\u8ff0\u5f3a\u8feb\u5bf9\u6d41\u7684\u516c\u5f0f\u4e3a\uff1a
    \n Nu = f(Re, Pr)
    \n
    \u8fd9\u91cc\uff0cNu\u662fNusselt\u6570\uff0cRe\u662fReynolds\u6570\uff0cPr\u662fPrandtl\u6570\u3002<\/p>\n<\/li>\n

  3. \n

    \u5c42\u6d41\u548c\u6e4d\u6d41<\/h2>\n

    \u5c42\u6d41\u662f\u6307\u6d41\u4f53\u5206\u5c42\u6d41\u52a8\uff0c\u6d41\u7ebf\u5e73\u884c\u4e14\u6d41\u52a8\u5e73\u7a33\u3002\u800c\u6e4d\u6d41\u662f\u6307\u6d41\u4f53\u4ea7\u751f\u6da1\u6d41\u548c\u6df7\u5408\uff0c\u6d41\u52a8\u5267\u70c8\u3002\u7814\u7a76\u5c42\u6d41\u548c\u6e4d\u6d41\u7684\u4e3b\u8981\u76ee\u7684\u662f\u63d0\u9ad8\u6d41\u4f53\u52a8\u529b\u4e0e\u70ed\u4ea4\u6362\u6548\u7387\u3002<\/p>\n

    Reynolds\u6570\u7528\u4e8e\u5224\u65ad\u6d41\u4f53\u662f\u5426\u4e3a\u5c42\u6d41\u6216\u6e4d\u6d41\uff1a
    \n Re = \\frac{\\rho u L}{\\mu}
    \n
    \u5982\u679cRe < 2000\uff0c\u5219\u4e3a\u5c42\u6d41\uff1b\u5982\u679cRe > 4000\uff0c\u5219\u4e3a\u6e4d\u6d41\uff1b\u57282000\u52304000\u4e4b\u95f4\u5219\u4e3a\u8fc7\u6e21\u6d41\u3002<\/p>\n<\/li>\n

  4. \n

    \u8f90\u5c04\u4f20\u70ed<\/h2>\n

    \u8f90\u5c04\u4f20\u70ed\u662f\u6307\u901a\u8fc7\u7535\u78c1\u6ce2\u5c06\u80fd\u91cf\u4ece\u4e00\u4e2a\u7269\u4f53\u4f20\u8f93\u5230\u53e6\u4e00\u4e2a\u7269\u4f53\uff0c\u800c\u4e0d\u9700\u8981\u4ecb\u8d28\u3002\u81ea\u7136\u754c\u4e2d\u8bb8\u591a\u8fc7\u7a0b\uff0c\u6bd4\u5982\u592a\u9633\u52a0\u70ed\u5730\u7403\uff0c\u90fd\u662f\u901a\u8fc7\u8f90\u5c04\u4f20\u70ed\u5b8c\u6210\u7684\u3002<\/p>\n

    \u8f90\u5c04\u4f20\u70ed\u7684\u57fa\u672c\u516c\u5f0f\u4e3a\uff1a
    \n Q = \\sigma \\epsilon A(T^4_{hot} – T^4_{cold})
    \n
    \u8fd9\u91cc\uff0cQ\u662f\u4f20\u9012\u7684\u70ed\u91cf\uff0c\u03c3\u662fStefan-Boltzmann\u5e38\u6570\uff0c\u03b5\u662f\u7269\u4f53\u7684\u53d1\u5c04\u7387\uff0cA\u662f\u7269\u4f53\u8868\u9762\u79ef\uff0cT\u662f\u6e29\u5ea6\u3002<\/p>\n<\/li>\n

  5. \n

    \u70ed\u5bfc\u7387\u6d4b\u91cf<\/h2>\n

    \u70ed\u5bfc\u7387\u6307\u6750\u6599\u4f20\u5bfc\u70ed\u91cf\u7684\u80fd\u529b\u3002\u4e0d\u540c\u6750\u6599\u7684\u70ed\u5bfc\u7387\u5dee\u5f02\u5f88\u5927\uff0c\u4e86\u89e3\u8fd9\u4e9b\u5dee\u5f02\u5bf9\u4e8e\u5de5\u7a0b\u6750\u6599\u9009\u62e9\u3001\u8bbe\u8ba1\u548c\u7ba1\u7406\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

    \u70ed\u5bfc\u7387\u8ba1\u7b97\u516c\u5f0f\u4e3a\uff1a
    \n k = \\frac{Q L}{A \\Delta T}
    \n
    \u8fd9\u91cc\uff0ck\u662f\u70ed\u5bfc\u7387\uff0cQ\u662f\u70ed\u6d41\u91cf\uff0cL\u662f\u4f20\u8f93\u8ddd\u79bb\uff0cA\u662f\u4f20\u8f93\u9762\u79ef\uff0c\u0394T\u662f\u6e29\u5dee\u3002<\/p>\n<\/li>\n<\/ol>\n

    \u901a\u8fc7\u4e86\u89e3\u548c\u5e94\u7528\u8fd9\u4e94\u79cd\u73af\u5883\u98ce\u6d41\u7814\u7a76\u7c7b\u578b\uff0c\u6211\u4eec\u80fd\u591f\u66f4\u597d\u5730\u8bbe\u8ba1\u548c\u4f18\u5316\u6d89\u53ca\u70ed\u80fd\u4f20\u8f93\u7684\u7cfb\u7edf\u548c\u8bbe\u5907\uff0c\u4ece\u800c\u63d0\u9ad8\u6548\u7387\u548c\u53ef\u6301\u7eed\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u73af\u5883\u98ce\u6d41\u7814\u7a76\u65b9\u6cd5\uff0c\u901a\u8fc7\u5206\u6790\u4e0d\u540c\u98ce\u6d41\u7c7b\u578b\u5982\u81ea\u7136\u5bf9\u6d41\u3001\u5f3a\u5236\u5bf9\u6d41\u3001\u6e4d\u6d41\u7b49\uff0c\u5e2e\u52a9\u7406\u89e3\u548c\u4f18\u5316\u70ed\u4ea4\u6362\u53ca\u8282\u80fd\u6548\u679c\uff0c\u63d0\u5347\u5de5\u7a0b\u6548\u7387\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":"\n5\u79cd\u73af\u5883\u98ce\u6d41\u7814\u7a76\u7c7b\u578b<\/title>\n<meta name=\"description\" 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