He kupu whakataki ki ngā kupu papu noa (1) – te tere rere + ngā tauira

1. Rere–E pā ana ki te rōrahi, te taumaha rānei o te wai e tukuna ana e tepapu waimō ia wae wā. Mēnā ka whakaaturia mā te Q, ko ngā wae ine e whakamahia whānuitia ana ko m3/h, m3/s, L/s rānei, t/h.

2.Upoko–E pā ana tēnei ki te pikinga o te pūngao o te kawe wai me te kaha taumaha mai i te pūngao tomo ki te pūngao putanga o te papu wai, arā, ko te pūngao e whiwhihia ana i muri i te rerenga o te wai me te kaha taumaha mā roto i te papu wai. Mēnā ka whakaaturia e h, ko te waeine ko Nm/N, e whakaaturia ana i te nuinga o te wā e te teitei o te pou wai e papua ana te wai; I ētahi wā ka whakaaturia te hangarau e te pēhanga hau, ā, ko te waeine ture ko kPa, MPa rānei.

 ( Tuhipoka: Wāhanga: m/p = ρ gh)

E ai ki te whakamāramatanga:

H=E_d-E_s

E_d-Pūngao mō ia taumaha o te wai i te putanga o te pūweropapu wai;

Es-Pūngao mō ia wae taumaha o te wai i te taha whakauru o te papu wai.

E_d=Z _d + P _d/ ρg + V²_d /2g

E_s=Z _s+ P_s / ρg+V²_s /2g

I te nuinga o te wā, me whakauru ngā wāhanga e rua o te pane i runga i te papa ingoa o te papu. Ko tētahi wāhanga ko te teitei pane ine, arā, ko te teitei poutū mai i te mata wai o te puna whakauru ki te mata wai o te puna putanga. E mōhiotia ana ko te pane tuturu, ko tētahi wāhanga o taua mea ko te ngaronga ātete i te huarahi ina haere te wai mā roto i te paipa, nō reira i te wā e whiriwhiri ana i te pane papu, me rite ki te tapeke o te pane tuturu me te ngaronga pane, arā:

Tauira o te tatau i te pane o te papu

Ki te hiahia koe ki te tuku wai ki tētahi whare teitei, me kī ko te wai e tukuna ana e te papu i tēnei wā he 50 mita.³/h, ā, ko te teitei poutū mai i te mata wai o te puna whakauru ki te taumata wai tuku teitei rawa atu he 54m, ko te roa katoa o te paipa tuku wai he 150m, ko te diameter o te paipa he Ф80mm, me te takirere raro kotahi, te takirere kuaha kotahi me te takirere kore-hoki kotahi, me ngā piko e waru 900 me te r/d = z, e hia te rahi o te pane papu hei whakatutuki i ngā whakaritenga?

Otinga:

Mai i te kupu whakataki i runga ake nei, e mōhio ana tātou ko te pane o te papu:

H =H_tūturu +H _ngaronga

Ko H te teitei poutū mai i te mata wai o te tāke whakauru ki te taumata wai kawe teitei rawa atu, arā: H_tūturu=54m

H_ngarongako ngā momo mate katoa i roto i te paipa, e tatauhia ana penei:

Ko te whānui o ngā paipa momi me te waikeri, ngā tuke, ngā takirere, ngā takirere kore-hoki, ngā takirere raro me ētahi atu diameter paipa e mōhiotia ana he 80mm, nō reira ko tōna horahanga whakawhiti-wāhanga ko:

Ina 50 m te tere o te rere³/h (0.0139 m)³/s), ko te tere rere toharite e rite ana ko:

E ai ki ngā raraunga, ko te ngaronga ātete i te diameter H, ina 2.76 m/s te tere rere o te wai, ko te ngaronga o te paipa maitai 100-mita te roa kua paku waikura ko te 13.1 m, koinei te mea e hiahiatia ana mō tēnei kaupapa whakarato wai.

Ko te ngaronga o te paipa waikeri, te tuke, te takirere, te takirere tirotiro me te takirere raro2.65m.

Upoko tere mō te tuku wai mai i te pūwero:

Nō reira, ko te pane katoa H o te papu ko

H _upoko= H _tūturu + H _{te ngaronga katoa}=54+19.65+2.65+0.388 = 76.692 (m)

I te wā e whiriwhiri ana i te puna wai teitei, me whakamahi te papu wai me te rere o te wai kia kaua e iti iho i te 50m³/h me te upoko kaua e iti iho i te 77 (m) te whiriwhiri.