Nhanganyaya kumashoko akajairika epombi (1) - mwero wekuyerera kwemvura + mienzaniso

1. Kuyerera–Inoreva huwandu kana huremu hwemvura inounzwa nepombi yemvurapanguva imwe neimwe. Zvichiratidzwa neQ, mayuniti anoshandiswa zvakanyanya ekuyera ndeaya m3/h, m3/s kana L/s, t/h.

2.Musoro–Inoreva simba rakawedzerwa rekutakura mvura neyuniti gravity kubva mukupinda kuenda kunobuda pombi yemvura, kureva kuti, simba rinowanikwa mushure mekunge mvura ine yuniti gravity yapfuura nemupombi yemvura. Ichiratidzwa ne h, yuniti iyi iNm/N, iyo inowanzo ratidzwa nekukwirira kwekoramu yemvura apo mvura inopombwa; Uinjiniya dzimwe nguva hunoratidzwa nekumanikidzwa kwemhepo, uye yuniti yepamutemo ikPa kana MPa.

 (Zvinyorwa: Chiyero: m/p = ρ gh)

Zvinoenderana netsananguro:

H=E_d-E_s

E_d-Simba pahuremu hwechinwiwa pachikamu chemagetsi chinobudapombi yemvura;

Es-Energy pahuremu hwechinwiwa pahuremu hwepombi yemvura.

E_d=Z _d + P _d/ ρg + V²_d /2g

E_s=Z _s+ P_s / ρg+V²_s /2g

Kazhinji, musoro uri papepa repombi unofanira kusanganisira zvikamu zviviri zvinotevera. Chikamu chimwe chete kureba kwemusoro kunoyerwa, ndiko kuti, kureba kwakamira kubva pamusoro pemvura yedziva rinopinda kusvika pamusoro pemvura yedziva rinobuditsa mvura. Inozivikanwa semusoro chaiwo, chikamu chayo kurasikirwa kwekudzivirira munzira kana mvura inopfuura nemupombi, saka pakusarudza musoro wepombi, inofanira kunge iri huwandu hwemusoro chaiwo uye kurasikirwa kwemusoro, ndiko kuti:

Muenzaniso wekuverenga musoro wepombi

Kana uchida kupa mvura kuchivako chakareba, ngatitii mvura iripo pari zvino iri papombi iri 50m.³/h, uye kukwirira kwakamira kubva pamusoro pemvura yedziva rekupinda kusvika padanho repamusoro rekutumira mvura i54m, hurefu hwese hwepombi yekuendesa mvura i150m, dhayamita yepombi iФ80mm, ine vharuvhu rimwe repasi, vharuvhu rimwe regedhi uye vharuvhu rimwe risingadzokeri, uye makoronga masere mazana mapfumbamwe ane r/d = z, musoro wepombi wakakura sei kuti usvike pazvinodiwa?

Mhinduro:

Kubva musumo iri pamusoro apa, tinoziva kuti musoro wepombi ndewekuti:

H =H_chaiye +H _kurasikirwa

Kupi: H ndiko kureba kwakamira kubva pamusoro pemvura yetangi rekupinda kusvika padanho repamusoro rekutakura mvura, ndiko kuti: H_chaiye=54m

H_kurasikirwandiyo mhando dzese dzekurasikirwa dziri kurongwa, idzo dzinoverengerwa seizvi:

Mapaipi ekukweva nekudonhedza mvura anozivikanwa, magokora, mavharuvhu, mavharuvhu asingadzore, mavharuvhu epasi nedzimwe dhayamita dzemapaipi dzine 80mm, saka nzvimbo yayo yepakati ndeiyi:

Kana mwero wekuyerera uri 50 m³/h (0.0139 m)³/s), avhareji yehuwandu hwekuyerera kwemvura inoenderana ndeiyi:

Kurasikirwa kwekudzivirira padhayamita H, zvichienderana nedata, kana mwero wekuyerera kwemvura uri 2.76 m/s, kurasikirwa kwepombi yesimbi ine ngura ye100-meter i13.1 m, inova ndiyo inodiwa nechirongwa ichi chekupa mvura.

Kurasikirwa kwepombi yekudhonza mvura, gokora, vharuvhu, vharuvhu yekuchekerera uye vharuvhu yepasi kuri2.65m.

Musoro wekukurumidza wekuburitsa mvura kubva mumuromo:

Saka, musoro wese H wepombi ndeye

H _musoro= H _chaiye + H _{kurasikirwa kwakazara}=54+19.65+2.65+0.388 = 76.692 (m)

Pakusarudza pombi yemvura yakakwirira, pombi yemvura ine kuyerera kwemvura kusingasviki 50m³/ h uye musoro usingapfuure 77 (m) unofanira kusarudzwa.