## What is Jet reaction?

Jet reaction in a fire monitor installed to a rigid pipe is found to equal and opposite to the force of the jet takes place at the nozzle and it tends to recoil in the opposite direction to the flow when water is sprayed from a nozzle. The jet reaction force is equal to the jet momentum flow rate.

## What is the formula for jet reaction?

The nozzle reaction is found to be: R = ρ Q 2 / A2 , where A2 is the discharge diameter, Q is the volumetric flow rate, R is the magnitude of the nozzle reaction, and r is the water density. This equation shows that the reaction is proportional to the flow rate squared, divided by the nozzle diameter.

**What is nozzle reaction?**

By definition, nozzle reaction is the force of the water being discharged that is directed to a person or device holding the nozzle. Nozzle reaction can be calculated for fog and smooth bore nozzles. Hand lines: 1¾” Hose: Task Force Tips (TFT) fog nozzle, 100 gpm = nozzle reaction 51 pounds.

**How do you calculate jet velocity?**

To evaluate and assess the effect of jet velocity on flow behavior, the flow Re was defined with respect to the hydraulic diameter of slot-jet as Re = V i n j D h / ν , where D h = 2 L for a two-dimensional slot jet configuration.

### How is jet force calculated?

To calculate the water jet reaction force, multiply the velocity of the water by the mass flow rate.

### How do you calculate water jet velocity?

Where V is water-jet velocity in ft/s and P is the pressure applied behind the nozzle, in kpsi. Equations (1) and (2) are simplified forms of the classic fluid mechanics equation that v = 0.98(2*P/ρ)0.5 where ρ is the density of water (1000 kg/m3 for equation (1) and P is in Pascals).

**What is nozzle pressure?**

Nozzle pressure is directly related to the velocity of the stream. For the given example, instead of a stream speeding through the fire’s super-heated gases at 80 mph, it goes through at 60 mph.

**How much nozzle reaction can a firefighter handle?**

Since nozzle reaction is dictated by a combination of pressure and flow, it serves as the perfect point in the discussion to bring the two together. With the finding that our firefighters felt most comfortable handling about 50 pounds of nozzle reaction, we had a starting point.

#### What is the jet velocity?

Jet Velocity is the velocity of a jet that can be the exit velocity of fluid after it accelerates through bit nozzles.

#### What is jet speed?

Most commercial aircraft typically fly at around 460-575 mph, or 740-930 km/h, according to Flight Deck Friend. But private jet speed can vary depending on a variety of factors, such as the weight onboard and the weather conditions.