Sekukurumidza-mhinduro inovandudzwa simba remagetsi, hydropower inowanzoita basa repamusoro pekutonga uye frequency regulation mugetsi remagetsi, izvo zvinoreva kuti hydropower mauniti anowanzo kuda kushanda pasi pemamiriro anotsauka kubva kumamiriro ekugadzira. Nekuongorora huwandu hukuru hwe data rekuyedza, zvinoratidzwa kuti kana iyo turbine ikashanda pasi pemamiriro asina dhizaini, kunyanya pasi pemamiriro emutoro wechikamu, kudzvanywa kwakasimba kuchaonekwa mune yekudhirowa chubhu ye turbine. Iyo yakaderera frequency yeiyi pressure pulsation ichakanganisa zvakanyanya kushanda kwakagadzikana kweturbine uye kuchengetedzwa kweyuniti uye workshop. Naizvozvo, kudzvanywa kweiyo dhizaini chubhu kwave kunetseka zvakanyanya neindasitiri uye academia.
Sezvo dambudziko rekumanikidza kupuruzira muchubhu yeturbine yakatanga kutaurwa muna 1940, chikonzero chave chiri kunetseka uye chakakurukurwa nenyanzvi dzakawanda. Parizvino, nyanzvi dzinowanzotenda kuti kudzvanywa kwechubhu yehuputi pasi pemamiriro emutoro wechikamu kunokonzerwa nekufamba kwe spiral vortex muchubhu yekunyora; kuvapo kwevortex kunoita kuti kuparadzirwa kwechisimba pachikamu chemuchinjiro wechubhu kusaenzana, uye pamwe neKutenderera kwebhanhire revortex, iyo asymmetric pressure field inotendererawo, zvichiita kuti kumanikidzwa kushanduke nguva nenguva, kuumba kudzvinyirira pulsation. Helical vortex inokonzerwa nekutenderera kuyerera kwechubhu inopinza pasi pechikamu chemutoro mamiriro (kureva, pane tangential chikamu chevelocity). Bhizinesi reUS reReclamation rakaita ongororo yekuyedza pane swirl mune yekudhirowa chubhu, uye yakaongorora iyo vortex chimiro nemafambiro pasi pemadhigirii akasiyana. Mhedzisiro yacho inoratidza kuti chete kana iyo swirl degree yasvika pane imwe nhanho, iyo spiral vortex bhendi inozoonekwa mune yekudhirowa chubhu. Iyo helical vortex inoratidzika pasi pemamiriro emutoro wechikamu, saka chete kana chiyero chekuyerera (Q / Qd, Qd ndiyo dhizaini yekuyerera kweyero) ye turbine oparesheni iri pakati pe 0.5 ne0.85, yakanyanya kudzvanywa pulsation ichaonekwa mudhizaini chubhu. Kuwanda kwechikamu chechikamu chikuru chekumanikidzika kunokonzerwa nebhanhire revortex inenge yakaderera, iyo yakaenzana ne0.2 kusvika ku0.4 nguva inotenderera inotenderera yemumhanyi, uye iyo duku yeQ / Qd, iyo yakakwirira yekudzvinyirira pulsation frequency. Mukuwedzera, kana cavitation ikaitika, mabhubhu emhepo anogadzirwa muvortex achawedzera ukuru hwevortex uye anoita kuti mhepo inoputika iwedzere, uye kuwanda kwekumanikidzwa kwemhepo kunochinjawo.
Pasi pemamiriro emutoro wechikamu, kudzvanywa kwehuputi muchubhu yekunyora kunogona kuunza kutyisidzira kukuru kune yakagadzikana uye yakachengeteka kushanda kweiyo hydroelectric unit. Kuitira kudzvanyirira iyi pressure pulsation, mazano mazhinji uye nzira dzakataurwa, sekuisa zvimbi pamadziro echubhu yekudhirowa uye kupinda mukati mechubhu yekudhirowa matanho maviri anoshanda. Nishi et al. yakashandisa nzira dzekuyedza uye dzenhamba yekudzidza mabatiro ezvimbi pakudzvanywa kwechubhu yekudhirowa, kusanganisira mhedzisiro yemhando dzakasiyana dzezvimbi, mhedzisiro yehuwandu hwezvimbi uye nzvimbo dzadzo dzekuisa. Mhedzisiro yacho inoratidza kuti kuiswa kwemafins kunogona kuderedza zvakanyanya eccentricity yevortex uye kuderedza kudzvanywa kwemhepo. Dmitry et al vakawanawo kuti kuiswa kwemafins kunogona kuderedza amplitude ye pressure pulsation ne30% kusvika 40%. Kufefetedza kubva pagomba repakati peiyo shaft huru kuenda kune yekudhirowa chubhu zvakare inzira inoshanda yekudzvinyirira kudzvanywa. Chiyero che eccentricity ye vortex. Mukuwedzera, Nishi et al. akaedzawo kupinza mhepo yechubhu kuburikidza nemaburi madiki ari pamusoro pechimbi, uye akaona kuti nzira iyi inogona kudzvanya kudzvanywa kwemhepo uye huwandu hwemhepo hunodiwa hudiki kwazvo kana chipedzi chisingakwanisi kushanda.
Nguva yekutumira: Aug-09-2022
