[問題] 流體力學-滅火器噴出速度
小魯在工作上碰到一個問題
一個裝海龍1301的滅火器 錶定壓力是700psi 接觸一管徑0.555in的硬管
欲求開關打開瞬間的噴出速度
https://imgur.com/71h9af3
![](https://i.imgur.com/71h9af3.jpg)
上網查海龍1301成分是CF3Br 密度是1.538 g/cm^3 = 0.001727 slug/in^3
以下是我的想法
https://imgur.com/GNa66Ko
![](https://i.imgur.com/GNa66Ko.jpg)
疑問一 跟管徑無關嗎
直覺洞愈大速度會愈小...這樣正確嗎?
疑問二 流速3118.95 in/s = 285.196788 km/hr
假設手提滅火器於離地1公尺高水平噴射(視為平拋運動)
則落地時間0.45s 落地水平距離1403.53in 將近30公尺遠...也太遠了吧
麻煩各位幫解惑了
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※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 123.240.89.118
※ 文章網址: https://www.ptt.cc/bbs/Mechanical/M.1504530804.A.C3A.html
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09/04 22:00, , 1F
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那請問大大 應該怎麼算呢?
※ 編輯: BanPeeBan (123.240.89.118), 09/04/2017 22:04:45
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大大那個網站好像還有一個什麼係數預設是0.7的 還要找找@@
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感謝 明天看
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是指終端速度嗎?感覺可以解終端速度
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沒有吧 340*3.6>285 km/hr
※ 編輯: BanPeeBan (123.240.89.118), 09/05/2017 22:22:19
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