{"id":37848,"date":"2023-05-15T15:58:10","date_gmt":"2023-05-15T07:58:10","guid":{"rendered":"https:\/\/3t-insulation.com\/%e7%83%9f%e6%b0%94%e5%92%8c%e5%a4%a9%e8%8a%b1%e6%9d%bf%e5%b0%84%e6%b5%81%ef%bc%88fire-plume-and-ceiling-jet%ef%bc%89\/"},"modified":"2026-01-28T23:27:21","modified_gmt":"2026-01-28T15:27:21","slug":"%e7%83%9f%e6%b0%94%e5%92%8c%e5%a4%a9%e8%8a%b1%e6%9d%bf%e5%b0%84%e6%b5%81%ef%bc%88fire-plume-and-ceiling-jet%ef%bc%89","status":"publish","type":"post","link":"https:\/\/3t-insulation.com\/zh-hans\/%e7%83%9f%e6%b0%94%e5%92%8c%e5%a4%a9%e8%8a%b1%e6%9d%bf%e5%b0%84%e6%b5%81%ef%bc%88fire-plume-and-ceiling-jet%ef%bc%89\/","title":{"rendered":"\u70df\u6c14\u548c\u5929\u82b1\u677f\u5c04\u6d41\uff08Fire Plume and Ceiling Jet\uff09"},"content":{"rendered":"

\u70df\u6c14\u548c\u5929\u82b1\u677f\u5c04\u6d41<\/h1><\/div><\/div><\/div>

<\/i><\/i><\/span>\u5185\u5bb9\u8f83\u957f\uff0c\u8bf7\u9009\u62e9\u9605\u8bfb<\/span><\/a><\/h4><\/div>
\n
<\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>

\u70df\u67f1\uff08Plume\uff09<\/h2><\/div>

\u70df\u67f1\uff08Plume\uff09\u662f\u7531\u4e8e\u6d6e\u529b\uff08Buoyancy force\uff09\u4f5c\u7528\u800c\u5782\u76f4\u4e0a\u5347\u7684\u70ed\u70df\u6c14\u548c\u70ed\u6c14\u4f53\u67f1\u72b6\u6d41\uff0c\u8fd9\u662f\u71c3\u70e7\u4ea7\u751f\u7684\u7ed3\u679c\u3002<\/p>\n

\u6d6e\u529b\uff08Buoyancy force\uff09\u662f\u7531\u70df\u6c14\u548c\u7a7a\u6c14\u5bc6\u5ea6\u5dee\u4ea7\u751f\u7684\u529b\uff0c\u56e0\u4e3a\u70df\u6c14\u6e29\u5ea6\u9ad8\uff0c\u5bc6\u5ea6\u4f4e\u4e8e\u51b7\u7a7a\u6c14\uff0c\u6240\u4ee5\u70df\u6c14\u4f1a\u5782\u76f4\u4e0a\u5347\u3002<\/p>\n<\/div>

\"\u5c01\u95ed\u7a7a\u95f4\u5185\u7684\u70df\u67f1\uff08Enclosure<\/span>
<\/div>

\u56fe - \u5c01\u95ed\u7a7a\u95f4\u5185\u7684\u70df\u67f1\uff08Enclosure Plume\uff09<\/p><\/div><\/div><\/div><\/div><\/div>

\u8f74\u5bf9\u79f0\u70df\u67f1\uff08Axisymmetric Plume\uff09<\/h2><\/div>

\u70df\u67f1\u53ef\u5206\u4e3a\u4e09\u4e2a\u533a\u57df<\/p>\n

Continuous Flame<\/b>\u8fde\u7eed\u706b\u7130\u533a<\/p>\n

Intermittent Flame<\/b>\u95f4\u6b47\u706b\u7130\u533a\uff0c\u6b64\u533a\u57df\u71c3\u6599\u71c3\u70e7\u63a5\u8fd1\u5b8c\u5168\uff0c\u706b\u7130\u4ec5\u90e8\u5206\u65f6\u95f4\u51fa\u73b0<\/p>\n

Buoyant Plume <\/b>\u6d6e\u529b\u70df\u67f1\u533a\uff0c\u6b64\u533a\u57df\u71c3\u70e7\u5df2\u5b8c\u5168\uff0c\u53ea\u6709\u70ed\u6c14\u6d41<\/p>\n<\/div>

\"\u8f74\u5bf9\u79f0\u70df\u67f1\uff08Axisymmetric<\/span>
<\/div>

\u56fe - \u8f74\u5bf9\u79f0\u70df\u67f1\uff08Axisymmetric Plume\uff09\n<\/p><\/div><\/div><\/div><\/div><\/div>

\u70df\u6c14\u901f\u5ea6\uff08Plume Velocity\uff09<\/h2><\/div>

\u6211\u4eec\u53ef\u4ee5\u6cbf\u70df\u67f1\u4e2d\u5fc3\u7ebf\u6d4b\u91cf\u4e0d\u540c\u9ad8\u5ea6\u7684\u70df\u6c14\u901f\u5ea6\uff0c\u5404\u533a\u57df\u7684\u901f\u5ea6\u8ba1\u7b97\u5982\u4e0b<\/p>\n

\u706b\u7130\u533a\uff1a<\/strong><\/p>\n

z\/Q\u03072\/5 <\/sup>< 0.08 u0<\/sub> = 6.8z1\/2<\/sup><\/p>\n

\u95f4\u6b47\u533a\uff1a<\/strong><\/p>\n

0.08 < z\/Q\u03072\/5 <\/sup>< 0.2 u0<\/sub> = 1.9Q\u03071\/5<\/sup><\/p>\n

\u70df\u67f1\u533a\uff1a<\/strong><\/p>\n

z\/Q\u03072\/5 <\/sup>> 0.2 u0<\/sub> = 1.1z-1\/3<\/sup>Q\u03071\/3<\/sup><\/p>\n<\/div><\/div><\/div>

\u70df\u6c14\u6e29\u5ea6\uff08Plume Temperature\uff09<\/h2><\/div>

\u6cbf\u4e2d\u5fc3\u7ebf\u7684\u70df\u6c14\u6e29\u5ea6\u968f\u9ad8\u5ea6\u589e\u52a0\u800c\u53d8\u5316\uff0c\u53ef\u5206\u4e3a\u4e09\u4e2a\u533a\u57df<\/p>\n

\u706b\u7130\u533a\uff1a<\/strong><\/p>\n

z\/Q\u03072\/5 <\/sup>< 0.08 \u2206T0 <\/sub>= 2.91T\u221e<\/sub><\/p>\n

\u95f4\u6b47\u533a\uff1a<\/strong><\/p>\n

0.08 < z\/Q\u03072\/5 <\/sup>< 0.2 \u2206T0 <\/sub>= 0.227(Q\u03072\/5<\/sup>\/z) T\u221e<\/sub><\/p>\n

\u70df\u67f1\u533a\uff1a<\/strong><\/p>\n

z\/Q\u03072\/5 <\/sup>> 0.2 \u2206T0 <\/sub>= 0.076T\u221e<\/sub> (Q\u03072\/5<\/sup>\/z)5\/3<\/sup><\/p>\n<\/div><\/div><\/div>

\u5929\u82b1\u677f\u5c04\u6d41\uff08Ceiling Jet\uff09<\/h2><\/div>

\u5f53\u70df\u6c14\u4e0a\u5347\u78b0\u5230\u5929\u82b1\u677f\u65f6\uff0c\u4f1a\u6cbf\u7740\u534a\u5f84\u65b9\u5411\u6d41\u52a8\uff0c\u6211\u4eec\u79f0\u8fd9\u79cd\u5929\u82b1\u677f\u4e0b\u7684\u6d41\u52a8\u4e3a\u5929\u82b1\u677f\u5c04\u6d41\u3002\u5929\u82b1\u677f\u5c04\u6d41\u7684\u6e29\u5ea6\u548c\u901f\u5ea6\u4e0e\u706b\u707e\u63a2\u6d4b\u8bbe\u5907\uff08\u5982\u55b7\u6dcb\u5934\u3001\u70ed\u63a2\u6d4b\u5668\u3001\u70df\u611f\u63a2\u6d4b\u5668\uff09\u7684\u54cd\u5e94\u65f6\u95f4\u76f4\u63a5\u76f8\u5173\u3002<\/p>\n<\/div>

\"\u5929\u82b1\u677f\u4e0b\u7684\u70df\u6c14\u6d41\u52a8\"<\/span>
<\/div>

\u56fe - \u5929\u82b1\u677f\u4e0b\u7684\u70df\u6c14\u6d41\u52a8<\/p><\/div><\/div><\/div>

\u5929\u82b1\u677f\u4e0b\u70df\u6c14\u6d41\u52a8\u53ef\u5206\u4e3a\u4e24\u79cd\u7c7b\u578b\uff0c\u8fd9\u53d6\u51b3\u4e8e\u6881\u6df1\u6bd4 (hb<\/sub>) \u548c\u6881\u95f4\u8ddd (W) \u4e0e\u71c3\u6599\u8868\u9762\u5230\u5929\u82b1\u677f\u9ad8\u5ea6 (H) \u7684\u6bd4\u503c\u3002<\/p>\n

\u975e\u53d7\u9650\u5929\u82b1\u677f\u5c04\u6d41\uff1a <\/span>hb<\/sub>\/H < 0.126(H\/W)1\/3<\/sup> <\/span>\u4e14 <\/span>W\/H > 1.2<\/p>\n

\u53d7\u9650\u5929\u82b1\u677f\u5c04\u6d41\uff1a <\/span>hb<\/sub>\/H > 0.126(H\/W)1\/3<\/sup> <\/span>\u4e14 0.4 < W\/H > 1.2<\/p>\n<\/div><\/div><\/div>

\u65e0\u7ea6\u675f\u5929\u82b1\u677f<\/h3><\/div>

\u8ddd\u79bbR\u5904\u7684\u5929\u82b1\u677f\u5c04\u6d41\u6e29\u5ea6<\/p>\n

R\/H < 0.18 \u2206TCJ <\/sub>= 16.9 Q\u03072\/3 <\/sup>\/H5\/3<\/sup><\/p>\n

R\/H > 0.18 \u2206TCJ <\/sub>= 5.38 (Q\u0307\/R)2\/3 <\/sup>\/H<\/p>\n

\u2206TCJ <\/span><\/sub>\u4e3a\u5929\u82b1\u677f\u5c04\u6d41\u6e29\u5ea6\u5dee<\/p>\n

\u8ddd\u79bbR\u5904\u7684\u5929\u82b1\u677f\u5c04\u6d41\u901f\u5ea6<\/p>\n

R\/H < 0.18 uCJ <\/sub>= 0.96(Q\u0307\/H)1\/3<\/sup><\/p>\n

R\/H > 0.18 uCJ <\/sub>= 0.195Q\u03071\/3<\/sup>H1\/2<\/sup> \/ R5\/6<\/sup><\/p>\n

uCJ <\/span><\/sub>\u4e3a\u5929\u82b1\u677f\u5c04\u6d41\u901f\u5ea6<\/p>\n<\/div>

\"\u65e0\u7ea6\u675f\u5929\u82b1\u677f\"<\/span>
<\/div>

\u65e0\u7ea6\u675f\u5929\u82b1\u677f<\/p><\/div><\/div><\/div><\/div><\/div>

\u6709\u7ea6\u675f\u5929\u82b1\u677f<\/h3><\/div>

\u8ddd\u79bbL\u5904\u7684\u5929\u82b1\u677f\u5c04\u6d41\u6e29\u5ea6\uff08L>W\/2\uff09<\/p>\n

\u2206TCJ<\/sub>\/\u2206T0<\/sub> = 0.37(H\/W)1\/3<\/sup> exp[ -0.16(L\/H)(W\/H)1\/3 <\/sup>]\n\u8ddd\u79bbL\u5904\u7684\u5929\u82b1\u677f\u5c04\u6d41\u901f\u5ea6\uff08L>W\/2\uff09<\/p>\n

uCJ<\/sub>\/u0 <\/sub>= 0.27\/(W\/H)1\/3<\/sup><\/p>\n

\u5f53L < W\/2\u65f6\uff0c\u901f\u5ea6\u548c\u6e29\u5ea6\u53ef\u7528\u65e0\u7ea6\u675f\u5929\u82b1\u677f\u5c04\u6d41\u516c\u5f0f\u8ba1\u7b97<\/p>\n<\/div>

\"\u6709\u7ea6\u675f\u5929\u82b1\u677f\"<\/span>
<\/div>

\u6709\u7ea6\u675f\u5929\u82b1\u677f<\/p><\/div><\/div><\/div><\/div><\/div>

\u793a\u4f8b2<\/h3><\/div>

\u67d0\u623f\u95f4\u53d1\u751f\u706b\u707e\uff0c\u71c3\u6599\u8868\u9762\u5230\u5929\u82b1\u677f\u9ad8\u5ea6\u4e3a3\u7c73\uff0c\u706b\u6e90\u6301\u7eed\u91ca\u653e\u70ed\u91cf1,000 kW\uff0c\u73af\u5883\u6e29\u5ea625\u00baC\uff0c\u8bf7\u56de\u7b54\u4ee5\u4e0b\u95ee\u9898\uff1a<\/p>\n

    \n
  • \u5728\u706b\u6e90\u4e0a\u65b93\u7c73\u5904\u5c5e\u4e8e\u706b\u7fbd\u6d41\u7684\u54ea\u4e2a\u533a\u57df\uff1f<\/li>\n
  • \u8ba1\u7b97\u706b\u6e90\u4e0a\u65b93\u7c73\u5904\u7684\u6e29\u5ea6\u548c\u5782\u76f4\u901f\u5ea6<\/li>\n
  • \u8ba1\u7b97\u534a\u5f842\u7c73\u5904\u7684\u5929\u82b1\u677f\u5c04\u6d41\u6e29\u5ea6\u548c\u901f\u5ea6\uff0c\u5f53\u6d41\u52a8\u4e3a\uff1a<\/li>\n<\/ul>\n
      \n
    • \n
        \n
      • \u65e0\u7ea6\u675f\u5929\u82b1\u677f\u5c04\u6d41 <\/span><\/li>\n
      • \u6709\u7ea6\u675f\u5929\u82b1\u677f\u5c04\u6d41\uff08W = 1.5 m\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/div>
        \"\"<\/span>
        <\/div>

        \u56fe - \u793a\u4f8b2\u7684\u793a\u610f\u56fe<\/p><\/div><\/div><\/div>

        \u5df2\u77e5\u6761\u4ef6\uff1a<\/p>\n

        Q\u0307 = 1,000 kW, z = 3 m, T\u221e<\/sub> = 25\u00baC = 25 + 273 = 298K<\/p>\n

        \u8ba1\u7b97 z\/Q 2\/5 <\/sup>\u4ee5\u786e\u5b9a3\u7c73\u9ad8\u5ea6\u5904\u7684\u70df\u67f1\u533a\u57df<\/p>\n

        z\/Q2\/5 <\/sup>= 3\/(1000)2\/5 <\/sup>= 0.19<\/p>\n

        \u7531\u4e8e 0.08 < z\/Q 2\/5 <\/sup>= 0.19 < 0.20\uff0c\u56e0\u6b64\u57283\u7c73\u9ad8\u5ea6\u5904\u70df\u67f1\u5904\u4e8e\u95f4\u6b47\u706b\u7130\u533a\u3002\u6211\u4eec\u53ef\u4ee5\u7528\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b973\u7c73\u9ad8\u5ea6\u5904\u7684\u6e29\u5ea6\u548c\u901f\u5ea6\uff1a<\/p>\n

        0.08 < z\/Q2\/5 <\/sup>< 0.20<\/p>\n

        u0<\/sub> = 1.9Q\u03071\/5 <\/sup>= 1.9(1,000)1\/5 <\/sup>= 7.56 m\/s<\/p>\n

        \u2206T0 <\/sub>= 0.227(Q\u03072\/5<\/sup>\/z) T\u221e <\/sub>= <\/span>0.227(1\/0.19)298 <\/span>= 357 K<\/p>\n

        \u56e0\u6b64\u70df\u67f1\u6e29\u5ea6\u4e3a T0<\/sub> \u2013 T\u221e <\/sub>= T0<\/sub> \u2013 298 = 357 \u6216 T0<\/sub> = 655K = 382 \u00baC<\/p>\n

        \u8ba1\u7b97\u7ed3\u679c\u8868\u660e\uff0c\u57283\u7c73\u9ad8\u5ea6\u5904\u70df\u67f1\u5904\u4e8e\u95f4\u6b47\u706b\u7130\u533a\uff0c\u5782\u76f4\u901f\u5ea6\u4e3a7.56 m\/s\uff0c\u6e29\u5ea6\u4e3a382 \u00baC<\/p>\n

        \u70df\u6c14\u53ef\u4ee5\u81ea\u7531\u6d41\u52a8\uff0c\u6211\u4eec\u53ef\u4ee5\u8ba1\u7b97\u5929\u82b1\u677f\u5c04\u6d41\u7684\u6e29\u5ea6\u548c\u901f\u5ea6\u3002\u5df2\u77e5R = 2 m\uff0cH = 3 m\uff0c\u56e0\u6b64R\/H = 2\/3 = 0.67 > 0.18\uff0c\u6240\u4ee5\u5929\u82b1\u677f\u5c04\u6d41\u6e29\u5ea6\u4e3a\uff1a<\/p>\n

        \u2206TCJ<\/sub> = 5.38 (1000\/2)2\/3<\/sup>\/3 = 112.97<\/p>\n

        \u2206TCJ <\/sub>= 112.97 K \u6216 TCJ<\/sub> = 410.97 K = 137.97\u00baC<\/p>\n

        \u5929\u82b1\u677f\u5c04\u6d41\u901f\u5ea6\uff0cR\/H = 0.67 > 0.18<\/p>\n

        uCJ <\/sub>= 0.195Q\u03071\/3<\/sup>H1\/2<\/sup> \/ R5\/6 <\/span><\/sup>= <\/span>0.195(1000)1\/3<\/sup>(3)1\/2<\/sup> \/(3)5\/6 <\/sup>= 1.89<\/p>\n

        \u8ddd\u79bb2\u7c73\u5904\u7684\u5929\u82b1\u677f\u5c04\u6d41\u901f\u5ea6\u4e3a1.89 m\/s<\/p>\n

        \u5728\u8ddd\u4e2d\u5fc32\u7c73\u5904\u7684\u65e0\u7ea6\u675f\u5929\u82b1\u677f\u5c04\u6d41\u6e29\u5ea6\u4e3a137.45\u00baC\uff0c\u901f\u5ea6\u4e3a1.89 m\/s<\/p>\n

        \u70df\u6c14\u6cbf\u6881\u95f4\uff08W = 1.5 m\uff09\u6d41\u52a8\uff0c\u5728L = 2 m\u5904\u7684\u6e29\u5ea6\u53ef\u4ee5\u7528\u4ee5\u4e0b\u516c\u5f0f\u8ba1\u7b97\uff1a<\/p>\n

        \u2206TCJ<\/sub>\/\u2206T0 <\/sub>= <\/span>0.37(H\/W)1\/3<\/sup> exp[ -0.16(L\/H)(W\/H)1\/3 <\/sup>]<\/p>\n

        = <\/span>0.37(3\/1.5)1\/3<\/sup> exp[ -0.16(2\/3)(1.5\/3)1\/3 <\/sup>]<\/p>\n

        = <\/span>0.428<\/p>\n

        u CJ <\/sub>\/ u 0 <\/sub>= <\/span>7.56 <\/span>\u5f97\u5230 <\/span>uCJ <\/sub>= 0.34(7.56) = 2.57 m\/s<\/p>\n

        \u5728\u7b2c\u4e8c\u79cd\u60c5\u51b5\u4e0b\uff0c\u70df\u6c14\u6cbf\u6881\u95f4\uff08W = 1.5 m\uff09\u6d41\u52a8\uff0c\u5728L = 2 m\u5904\u7684\u6e29\u5ea6\u4e3a178 \u00baC\uff0c\u901f\u5ea6\u4e3a2.57 m\/s<\/p>\n

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