Gabatarwa zuwa Sharuɗɗan Juya Halin gama gari (6) - Tsarin Ka'idar Cavitation

Cavitation Pice: ka'idar da lissafi

Takaitaccen bayani game da cavitation na cavitation
Matsin lamba na VAPORIZIZZIZZA shi ne matsin lamba na ruwa (cikakken turawa mai tururuwa). Matsin lambar ruwa na ruwa yana da alaƙa da zazzabi. A mafi girman zafin jiki, mafi girma matsin lamba. A vaporization matsa matsin lamba na ruwa mai tsabta a ɗakin zafin jiki na 20 ℃ shine 233.8pa. Yayin da matsin lamba na ruwa a 100 ℃ shine 101296PA. Saboda haka, tsabta ruwa a zazzabi a ɗakin (20 ℃) ​​fara vaporize lokacin da matsin lamba ya sauka zuwa 233.8pa.
Lokacin da matsa lamba na ruwa ya ragu ga matsin lamba a wani zazzabi, ruwa zai haifar da kumfa, wanda ake kira cavitation. Koyaya, tururi a cikin kumfa ba ainihin tururi bane gaba ɗaya, amma kuma ya ƙunshi gas (galibi iska) a cikin hanyar rushewa ko nasagi.
Lokacin da kumfa ke haifar da lokacin cavitation kwarara zuwa babban matsin lamba, ƙarar su tana raguwa kuma har ma ta fashe. Wannan sabon abu wanda kumfa ya shuɗe cikin ruwa saboda tashi matsa lamba ana kiran shi Cavitation.

Fanar ta cavitation a cikin famfo
Lokacin da famfon yake aiki, idan yanki na yankin ya mamaye sashin ƙarfe (galibi wani wuri a baya a cikin inet na mai ɓarnuwa). Saboda wasu dalilai, lokacin da cikakkiyar matsin lamba na ruwa ya saukad da matsin lamba a zazzabi na yanzu, ruwa yana farawa a wurin, samar da tururi da kuma samar da kumfa. Wadannan kumfa suna gudana gaba tare da ruwa, kuma lokacin da suka isa wani matsin lamba, ruwa mai ƙarfi a kusa da kumfa don ƙin kumburi sosai har ma fashe. Lokacin da kumfa ya fashe, barbashi mai ruwa zai cika kogon a saurin saurin haɗawa da juna don ƙirƙirar guduma ruwa. Wannan sabon abu zai haifar da lalacewar abubuwan da aka lalata game da abubuwan da suka shafi na yanzu lokacin da ya faru a jikin bango mai ƙarfi.
Wannan tsari shine tsarin cavitation na famfo.

Tasiri na cavitation
Samar da hayaniya da girgizawa
Lalata lalata abubuwan da aka gyara na yanzu
Degradation Aikin

a

Famfo cavitation daidaitawa
Ana kuma kiran izini na NPSHR-Stamp cavitation wanda ya dace da izni na cavitation, kuma ana kiranta ingantacciyar hanya ta waje.
NPSHA-The cavitation izni na na'urar ana kiranta ingantaccen izinin cavitation, wanda aka bayar ta hanyar hada-hade. Mafi girma na NPSHA, mafi ƙarancin famfo famfo zai cavitation. NPHA yana raguwa da karuwar zirga-zirga.

b

Dangantaka tsakanin NPSHA da Npshr lokacin da canje-canje masu gudana

Hanyar ƙididdigar hanyar cavitation

HG = PC / ρg-hc-pv / ρg- [npsh]

[Npsh]
[Npsh] = (1.1 ~ 1.5) npshr

Lokacin da ƙimar kwarara tana da girma, ɗauki babban darajar, kuma idan ƙimar kwararar ta ce ƙanana, ɗauki ƙaramin ƙima.


Lokaci: Jan - 22-2024