1. Te tatau i te nui o te tanumanga:
Q= 3600*b*v*h*Y
Q: te tere o te whakaputanga, waeine: t/h
b: whānui o te tātari, waeine: m
h: te matotoru toharite o te rauemi, waeine: m
γ : te mātotoru o te rauemi, te waeine: t/m3
v: tere oma rauemi, waeine: m / s
2. Ko te tikanga tatau mō te tere oma o te rauemi wiri raina ko:
v=kv*λ *w*cos(6 ) * [1+tg(δ )*g(a ) ]
3. Ko te tikanga tatau mō te tere oma o te rauemi wiri porowhita ko:
v=kv*λ *w2* (1+ ) *a ;
Kv: tauwehenga wheako whānui, ko te tikanga he 0.75 ~ 0.95
λ: te whānuitanga kotahi, waeine: mm

w: auau wiri, waeine: rad/s

δ : koki ahunga wiri, waeine: °
a : te piko o te mata, waeine: °
4. Kawenga hihiri: P = k*A
k: te pakari o te puna, te waeine: N/m
λ: te whānui, te waeine: m
P: kawenga hihiri, waeine: N
Ka tatauhia te kawenga hihiri mōrahi (kawenga wiri noa) kia 4 ki te 7 ngā whakarea o te hua i runga ake nei.

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