Nūhou

Ke kōkua ʻo Zonel Filtech i nā mea kūʻai aku e hoʻomaikaʻi i kā lākou ʻohi lepo, ua hoʻopiʻi ʻia kekahi o lākou no ka hoʻomaʻemaʻe ʻana i kā lākouhale kānana ʻekeʻAʻole maikaʻi ka hana inā hoʻohana lākou i ka paipu alakaʻi ea ma ka paipu puhi ea, me ka venturi, a me ke kaomi pololei no ka ea i hoʻopaʻa ʻia, no laila ʻaʻole hiki iā lākou ke loaʻa ka hopena no ka hoʻomaikaʻi ʻana i nā hana hoʻomaʻemaʻe.

Ma hope o ka nānā ʻana i kā lākou ʻōnaehana hoʻomaʻemaʻe, ʻike ʻia nā ʻenekini Zonel ʻo ke kumu nui ʻaʻole pololei ka mamao ma waena o kā lākou ea alakaʻi paipu i ka ʻeke ʻeke pepa. Inā ʻoi aku ka nui o ka mamao, hiki i ka ea ke puhi i kekahi i ka pepa paipu ʻeke ma kahi o nā ʻeke kānana; akā, inā liʻiliʻi, ʻaʻole hiki i ka ea kaomi ke alakaʻi i ka ea i waho i loko o nā ʻeke kānana, ʻaʻole maikaʻi ka hopena hoʻomaʻemaʻe.

Akā, pehea e wehewehe ai i kēia mamao (H1 ma ke kaha kiʻi aʻe) ?

１
E like me ka mea maʻamau, helu mākou i ka Øp me kēia ʻano kumu:
Øp=(C*D^2/n) ^1/2
C = Coefficient, e like me ke koho maʻamau 50% ~ 65%.
D=pulse jet valve puka anawaena, e like me ka mea mau i ka paipu puhi ea.
n=ka helu ʻeke kānana no kēlā me kēia lālani (hoʻomaʻemaʻe ʻia me ka pahu hoʻoheheʻe pulse like)
E like me ka mea maʻamau, koho mākou i ka C 0.55.
ʻO ka hapa nui, ʻo ka ea alakaʻi paipu ke anawaena he 2 ~ 3 manawa o ka Øp.

 

2. E wehewehe i ka lōʻihi o ka paipu alakaʻi ea.
E hoʻohana i ka paipu alakaʻi ea e like me ka mea maʻamau:
L=Ck* Øp/K
Ck = coefficient, e like me ka maa mau koho 0.2~0.25
ʻO K=ʻo ia ka huina hoʻoweliweli jet, koho cylindrical 0.076.
ʻo ia hoʻi L= ma kahi o 0.2* Øp/0.076=2.65 Øp

 

3. He mea maʻalahi loa ka loaʻa ʻana o kēlā tg ke kēkelē =(1/2 Øb)/H2
tg a degere= 3.4K=0.272 (hiki ke mālama ʻia ma ke ʻano he mau)
No laila, koho kahi kekelē he 15 degere.

 

ʻo kahi laʻana:
Inā koho 3" immerged pulse jet valve, alakaʻi paipu d=30mm, kānana ʻeke anawaena he 160mm, pehea e loaʻa ai ka H1.
Pane:
ʻIke loa, ʻo ka H1=H2-L
No laila pono mākou e wehewehe i ka H2 a me L.

tg a degere =(1/2 Øb)/H2=3.4K=0.272
ʻo ia hoʻi H2=1.838 Øb

Øb = 160mm
No laila ka H2=294 mm

3” e like me ka maʻamau o ka awelika Øp=15 mm (hiki ke helu i ka wā e hāʻawi ʻia ai ka ʻeke qty, a i ʻole e like me ka ʻike ʻike, hoʻopili ʻia e ʻoluʻolu e ʻimi.)
Mai ka hopena mua, L=2.65 Øp, no laila ka L=2.65*15=40 mm
No laila ka H1=294-40=254mm.

 

No ka Qp, hiki ke koho ʻia ka ʻikepili awelika penei:
ʻO ka nui o ka pahu jet pulupulu ---- Qp
3/4”----5~7mm
1” ---- 6~8mm
1 1/2”----7~9mm
2”----8~11mm
2 1/2”----9~14mm
3”----14~18mm
4”----16~22mm

 

E like me ka mea maʻamau, i ka wā e māhele ʻia ai ka hoʻolālā Qp i 3 ~ 4 mau pūʻulu, kokoke i ka valve jet pulse, ʻoi aku ka nui o ka hāmama, a hui pū i nā ʻokoʻa anawaena e pili ana i 1mm.