通风管道-小损失阻力
通风管道中的小压力或水头损失与风速-小损失系数图。
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压力损失小-Pa或N/m2-可通过使用下面的图表或表格来估计风管:
| 轻微的损失(Pa, N / m2） | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 流速 (米/秒) |
小损失阻力系数-ξ | |||||||||
| 1 | 2 | 3. | 4 | 5 | 6 | 7 | 8 | 9 | 10 | |
| 2 | 2.4 | 4.8 | 7.3 | 9.7 | 12.1 | 14.5 | 16.9 | 19.4 | 21.8 | 24.2 |
| 2.5 | 3.8 | 7.6 | 11.3 | 15.1 | 18.9 | 22.7 | 26.5 | 30.3 | 34.0 | 37.8 |
| 3. | 5.4 | 10.9 | 16.3 | 21.8 | 27.2 | 32.7 | 38.1 | 43.6 | 49.0 | 54.5 |
| 3．5 | 7.4 | 14.8 | 22.2 | 29.6 | 37.1 | 44.5 | 51.9 | 59.3 | 66.7 | 74.1 |
| 4 | 9.7 | 19.4 | 29.0 | 38.7 | 48.4 | 58.1 | 67.8 | 77.4 | 87.1 | 96.8 |
| 4．5 | 12.3 | 24.5 | 36.8 | 49.0 | 61.3 | 73.5 | 85.8 | 98.0 | 110 | 122 |
| 5 | 15.1 | 30.3 | 45.4 | 60.5 | 75.6 | 90.8 | 105 | 121 | 136 | 151 |
| 5.5 | 18.3 | 36.6 | 54.9 | 73.2 | 91.5 | 109 | 128 | 146 | 164 | 183 |
| 6 | 21.8 | 43.6 | 65.3 | 87.1 | 108 | 130 | 152 | 174 | 196 | 217 |
| 6.5 | 25.6 | 51.1 | 76.7 | 102 | 127 | 153 | 178 | 204 | 230 | 255 |
| 7 | 29.6 | 59.3 | 88.9 | 118 | 148 | 177 | 207 | 237 | 266 | 296 |
| 7．5 | 34.0 | 68.1 | 102 | 136 | 170 | 204 | 238 | 272 | 306 | 340 |
| 8 | 38.7 | 77.4 | 116 | 154 | 193 | 232 | 271 | 309 | 348 | 387 |
| 8.5 | 43.7 | 87.4 | 131 | 174 | 218 | 262 | 306 | 349 | 393 | 437 |
| 9 | 49.0 | 98.0 | 147 | 196 | 245 | 294 | 343 | 392 | 441 | 490 |
| 9.5 | 54.6 | 109 | 163 | 218 | 273 | 327 | 382 | 436 | 491 | 546 |
| 10 | 60.5 | 121 | 181 | 242 | 302 | 363 | 423 | 484 | 544 | 605 |
| 10.5 | 66.7 | 133 | 200 | 266 | 333 | 400 | 466 | 533 | 600 | 667 |
| 11 | 73.2 | 146 | 219 | 292 | 366 | 439 | 512 | 585 | 658 | 732 |
| 11.5 | 80.0 | 160 | 240 | 320 | 400 | 480 | 560 | 640 | 720 | 800 |
| 12 | 87.1 | 174 | 261 | 348 | 435 | 522 | 609 | 697 | 784 | 871 |
| 12.5 | 94.5 | 189 | 283 | 378 | 472 | 567 | 661 | 756 | 850 | 945 |
| 13 | 102 | 205 | 306 | 409 | 511 | 613 | 715 | 818 | 920 | 1022 |
| 13.5 | 110 | 221 | 330 | 441 | 551 | 661 | 771 | 882 | 992 | 1102 |
| 14 | 119 | 237 | 355 | 474 | 592 | 711 | 830 | 948 | 1067 | 1185 |
| 14.5 | 127 | 254 | 381 | 508 | 636 | 763 | 890 | 1017 | 1144 | 1272 |
| 15 | 136 | 272 | 408 | 544 | 680 | 816 | 952 | 1089 | 1225 | 1361 |
| 15.5 | 145 | 290 | 436 | 581 | 726 | 872 | 1017 | 1162 | 1308 | 1453 |
| 16 | 155 | 309 | 464 | 619 | 774 | 929 | 1084 | 1239 | 1393 | 1548 |
| 16.5 | 165 | 329 | 494 | 658 | 823 | 988 | 1153 | 1317 | 1482 | 1647 |
| 17 | 175 | 349 | 524 | 699 | 874 | 1049 | 1223 | 1398 | 1573 | 1748 |
| 17.5 | 185 | 370 | 555 | 741 | 926 | 1111 | 1297 | 1482 | 1667 | 1852 |
| 18 | 196 | 392 | 588 | 784 | 980 | 1176 | 1372 | 1568 | 1764 | 1960 |
| 18.5 | 207 | 414 | 621 | 828 | 1035 | 1242 | 1449 | 1656 | 1863 | 2070 |
| 19 | 218 | 436 | 655 | 873 | 1092 | 1310 | 1528 | 1747 | 1965 | 2184 |
| 19.5 | 230 | 460 | 690 | 920 | 1150 | 1380 | 1610 | 1840 | 2070 | 2300 |
| 20. | 242 | 484 | 726 | 968 | 1210 | 1452 | 1694 | 1936 | 2178 | 2420 |
| 20.5 | 254 | 508 | 762 | 1017 | 1271 | 1525 | 1779 | 2034 | 2288 | 2542 |
| 21 | 267 | 533 | 800 | 1067 | 1334 | 1600 | 1867 | 2134 | 2401 | 2668 |
| 21.5 | 280 | 559 | 839 | 1118 | 1398 | 1678 | 1957 | 2237 | 2517 | 2796 |
| 22 | 293 | 585 | 878 | 1171 | 1464 | 1756 | 2049 | 2342 | 2635 | 2928 |
| 22.5 | 306 | 612 | 918 | 1225 | 1531 | 1837 | 2144 | 2450 | 2756 | 3062 |
| 23 | 320 | 640 | 960 | 1280 | 1600 | 1920 | 2240 | 2560 | 2880 | 3200 |
| 23.5 | 334 | 668 | 1002 | 1336 | 1670 | 2004 | 2338 | 2672 | 3007 | 3341 |
| 24 | 349 | 697 | 1045 | 1393 | 1742 | 2090 | 2439 | 2787 | 3136 | 3484 |
| 24.5 | 363 | 726 | 1089 | 1452 | 1815 | 2178 | 2542 | 2905 | 3268 | 3631 |
| 25 | 378 | 756 | 1134 | 1512 | 1890 | 2268 | 2646 | 3025 | 3403 | 3781 |
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