Cavitation nke igbapu: ozizi na mgbako
Isi nke Cavitation Phenomenon
Nrụgide nke veporization nke veporization bụ nrụgide veporization nke mmiri mmiri (juputara na nrụgide vepo). Nsogbu vaporization nke mmiri na-emetụta okpomọkụ. Elu okpomọkụ dị elu, nrụgide veporization. Ọnọdụ veporization nke mmiri dị ọcha na ụlọ okpomọkụ nke 20 ℃ 123.8PA. Ọ bụ ezie na mmiri nke mmiri na 100 ℃ bụ 101296PA. Ya mere, dị ọcha mmiri na ụlọ okpomọkụ (20 ℃) na-amalite ịrapara mgbe nrụgide dara 233.8pa.
Mgbe nrụgide nke mmiri na-ebelata ka nsogbu veporization na ụfọdụ okpomọkụ, mmiri mmiri ga-emepụta etemeete, nke a na-akpọ cavitation. Agbanyeghị, vepo na afụ afụghị kpamkpam uzuoku, kamakwa ọ na-enwe gas (tumadi ikuku) n'ụdị mgbasa ma ọ bụ nucleus.
Mgbe egosipụtapụtara n'oge cavitation na-ebuli elu, olu ha na-ebelata ma na-agbakwa ọsọ. A na-akpọ ihe ịtụnanya a na-egbu egbu na mmiri n'ihi nrụgide na-akpọ ọkwa cavitaị.
Ihe omume nke cavitation na mgbapụta
Mgbe pump na-arụ ọrụ, ọ bụrụ na mpaghara mpaghara ya zuru oke (ọ na-abụkarị n'azụ inlet nke mmiri na-akụ). N'ihi ihe ụfọdụ, mgbe ihe nrụpụta mmiri ahụ dara na nrụgide nke ugbu a, mmiri mmiri na-amalite ịta ebe ahụ, na-emepụta uzuoku ma na-akpụ akpụ akpụ. Ihe ndị a na-agba site na mmiri mmiri na-asọgharị, na mgbe ha ruru otu nrụgide dị elu, mmiri mmiri dị elu gburugburu ụfụfụ ndị na-amanye egosipụta nke ọma ma gbadaa. Mgbe afụ afụ ga-eme, mmiri mmiri ga-ejupụta oghere na oke ọsọ ma na-agbakọ ibe ha. Ihe a ga - eme ka corrosoin mebiri emebi nke ugbu a mgbe ọ na - eme na mgbidi siri ike.
Usoro a bụ usoro mgbapụta cavitation.
Mmetụta nke cavitation
Mepụta mkpọtụ na ịma jijiji
Mmebi corrosion nke ihe ndị dị ugbu a
Mmebi arụmọrụ
Pọmpụ cavitations nha
A na-akpọkwa enyemaka nke NPSHR cavitation dị mkpa cavitation, a na-akpọ ya dị mkpa ụgbụ nkọ dị mma na mba ọzọ.
A na-akpọkarị cavitation cavitation nke ngwaọrụ nke ọma cavitation, nke ngwaọrụ na-enye ya. Onye ka ukwuu na npsha, o yikarịrị ka mgbapụta ahụ ga-cavitation. NPHA na-ebelata na mmụba nke okporo ụzọ.
Mmekọrịta dị n'etiti NPHA na NPSHR mgbe mgbanwe mgbanwe
Usoro mgbakọọ nke cavitation cavitation
HG = PC / ρG-hc-pv / ρg- [npsh]
[NPSH]
[Npsh] = (1.1 ~ 1.5) npshr
Mgbe ọnụego agbagoro buru ibu, na-ewe nnukwu uru, na mgbe ọnụego ọnụego dị obere, were obere uru.
Oge Post: Jan-22-2024