Lance à incendie

8.2 μs

 
begin
    D₁ = 8e-2
    D₂ = 3e-2
    Qᵥ = 40e-3
    P₂ = 1e5
    ρ = 1000
end

135 ns

6.3 μs

vitesse (generic function with 1 method)

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vitesse(Qᵥ, D) = 4Qᵥ / π / D ^ 2

15.2 μs

v₁

7.957747154594768

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v₁ = vitesse(Qᵥ, D₁)

175 ns

v₂

56.588424210451684

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v₂ = vitesse(Qᵥ, D₂)

194 ns

5.0 μs

P₁

1.6694620074227867e6

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P₁ = P₂ + ρ * (v₂ ^ 2 - v₁ ^ 2) / 2

7.0 μs

4.2 μs

Qₘ

40.0

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Qₘ = ρ * Qᵥ

90.0 ns

0.00502655

0.000706858

x
 
S₁, S₂ = π * D₁ ^ 2 / 4, π * D₂ ^ 2 / 4

5.8 ms

6375.718407806664

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F = (Qₘ * v₁ + P₁ * S₁) - (Qₘ * v₂ + P₂ * S₂)

116 ns