Ka mahi ngā tāpine waipēhi i raro i ngā āhuatanga waipēhi me ngā āhuatanga miihini uaua, e taunekeneke tonu ai te pēhanga, te tere, me ngā tauira rere. Ko tētahi o ngā wero nui e pā ana ki te pono me te whai huatanga o ngā tāpine ko te cavitation me te pirau cavitation (pitting) e puta mai ana. He mea nui te mārama ki ēnei āhuatanga hei whakapai ake i te hoahoa tāpine, hei whakarite i te pumau mō te wā roa, me te whakaiti i ngā utu tiaki i roto i ngā tipu hiko wai.
1. He aha te Cavitation i roto i ngā Turbine Waipēhi
Ka puta te āputaputa ina heke te pēhanga wai ā-rohe ki raro iho i tōna pēhanga kohu, ka puta he mirumiru kohu i roto i te wai e rere ana. I te nekenga o ēnei mirumiru ki ngā rohe pēhanga teitei ake, ka hinga kino, ka puta he ngaru ru me ngā moroiti e pā ana ki ngā mata tata.
I roto i ngā tāpine waipēhi, ka puta te cavitation i ngā wāhi e
He tere te rere o te wai
He iti te pēhanga
Ka puta te wehenga o te rere, te pōrearea rānei
Ko ngā rohe e pāngia ana e te cavitation ko:
Te taha momi o te mata o te kaiārahi
Te tomokanga o te ngongo tauira
Ngā taha whai muri o te vane aratohu
Ngā pito o te mata me ngā rohe pokapū
2. Te Horoitanga o te Āputa Te Huanga Whakangaro
Ina hinga ngā mirumiru kohu i te taha o ngā mata whakarewa, ka tangohia māriretia ngā rauemi mai i ngā wāhanga o te tāpine e ngā pānga moroiti maha. E mōhiotia ana tēnei tukanga ko te cavitation erosion (te cavitation pitting rānei). I roto i te wā, ka arahi ki te taratara o te mata, te ngaronga o ngā rauemi, me te pirau o te hanganga.
Ngā Āhuatanga Matua o te Horoitanga o te Cavitation
Te hanganga o ngā rua, te kino rānei o te mata e rite ana ki te honikoma
Te ngenge haere o ngā rauemi me ngā kapiti moroiti
Te whakaiti i te pai o te waipēhi
Te pikinga ake o te wiri me te haruru
Ki te kore e whakahaerea, ka taea e te pirau nui o te pūwero te whakapoto i te roa o te mahi a te tāpine, me te whakanui ake i te wā kore mahi tiaki.
3. Ngā Take o te Cavitation i roto i ngā Turbine Hydraulic
He maha ngā āhuatanga waipēhi me ngā āhuatanga whakahaere e whai wāhi ana ki te hanganga cavitation
3.1 Ngā Take Hoahoa Waipēhi
Te kōtaha mata, te piko rānei kāore i te tika
Te tere tere o te rere
Te tohatoha rere ngoikore i te tomokanga o te kaikawe
Te hoahoa ngongo tauira kāore i te rawaka
3.2 Ngā Tikanga Whakahaere
Te mahi i te kawenga kore-hoahoa
Tere rawa o te tāpine
Te whakakorenga ohorere o te kawenga, ngā āhuatanga rere kore pumau rānei
Te iti o te taumata wai hiku, te teitei rānei o te pane momi
3.3 Ngā Take Taiao
Te kukū teitei o te paru i roto i te wai
Ngā rerekētanga pāmahana e pā ana ki te pēhanga kohu
Te urunga o te hau, ngā hau rewa rānei
4. Ngā Pānga o te Cavitation ki te Mahi a te Turbine
Ehara i te mea ka kino noa ngā rauemi i te cavitation engari ka pāngia hoki te mahi whānui o te tāpine.
4.1 Te Ngaronga o te Whai Hua
Ka whakanui ake te poka i te mata i te ātete waipēhi, ka whakararuraru hoki i te rere maeneene, ka whakaiti i te pai o te mahi a te tāpine.
4.2 Te Kino Ā-Mīhini
Ka ngoikore ngā mata, ngā tītaha ārahi, me ngā arai o ngā ngongo mimiti i te horo haere tonu, ā, ka mutu, ka rerekē te āhua, ka whati rānei.
4.3 Te Whakanuia o te Wiri me te Haruru
Ka puta he pāorooro pēhanga auau teitei i te hinganga o te mirumiru, ka puta te wiri, te haruru, me te ahotea pea o te peera.
4.4 Te Whakaiti i te Ora Ratonga
Ka tere ake te pakaru o te kiri nā te mimiti kore e āraia, ā, me whakatikatika pinepine, me whakakapi rānei ngā wāhanga.
5. Te Kimi me te Aroturuki i te Cavitation
Mā te kitenga wawe ka ārai i ngā kino kino. Ko ngā tikanga aroturuki noa ko
Te aroturuki i ngā tukunga oro (te kimi i te haruru o te hinganga o te mirumiru)
Tātaritanga wiri o te kaikawe me ngā peera
Tirotiro ā-kanohi i te wā e kati ana ngā mahi kua whakaritea
Te tātari i te au o te whai huatanga
Mā ēnei tikanga ka taea e ngā kaiwhakahaere te tautuhi i ngā āhuatanga e pāngia ana e te cavitation me te whakarerekē i ngā tawhā whakahaere i te wā tika.
6. Ngā Rautaki Whakaiti me te Ārai
6.1 Hoahoa Waipēhi Arotau
Whakamahia ngā whakatauira CFD matatau hei whakapai ake i te āhua o te mata o te oma.
Me whakarite kia maeneene te tohatoha o te pēhanga puta noa i ngā mata o te mata
Whakapai ake i ngā āhuatanga whakaora o ngā ngongo tauira
6.2 Te Kōwhiringa Rauemi me te Tiakitanga Mata
Kowiri tira, koranu ātete-cavitation rānei
Ngā paninga mārō, ngā paninga rehu wera rānei
He mata oro, he maeneene hoki hei whakaiti i te piri o te mirumiru
6.3 Te Whakahaere me te Whakahaere Tika
Kia mau tonu te mahi tata ki te pūwāhi pai rawa atu (BEP)
Ārai i ngā piki me ngā heke tere o te kawenga
Me whakarite kia rawaka te taumata wai o te hiku me te taha o te pane momi
6.4 Ngā Tikanga Werohanga Hau
I roto i ētahi hoahoa tāpine, ka whakaitihia te kaha o te cavitation me te whakamāmā i ngā pao o te pehanga mā te whakaurunga o te hau whakahaeretia ki roto i te ngongo tauira.
7. Ngā Huarahi Tiaki me te Whakatika
Ina kitea te horo o te cavitation, he mea nui te tiaki i te wā tika.
Te huri me te whakakanapa i ngā wāhi e pāngia ana
Te whakatikatika whakarewa, te whakarewa paparua rānei mō ngā poka kino
Te paninga anō i ngā mata pakaru ki ngā rauemi ārai-cavitation
Ngā wā tirotiro kua whakaritea i runga i ngā āhuatanga whakahaere
He iti ake te utu o te tiaki ārai i te whakakapinga wāhanga nui.
He wero kore e taea te karo i te cavitation me te cavitation degradation i roto i te whakahaere tāpine waipēhi, engari ka taea te whakahaere pai i ōna pānga mā te hoahoa tika, te whiriwhiri rauemi, te whakahaere pai, me te pūnaha.
Wā tuku: 24-Pepuere-2026
