What is the choke flow rate in a vacuum?
• The actual flow rate is constant for the outlet pressure range of 35.30 psig to as low as a complete vacuum. The flow rate can be obtained from the charts on pages 16-18; e.g. for an orifice of .010″ diam- eter and with 80 psig inlet pressure, the choked flow rate is 8.4 scfh (page 16).
When does choked flow occur in a gas tank?
If flow is choked, then choking occurs at location 2. Choked flow occurs if P 3 < P 2*. P 2* is the static pressure at location 2 if flow is choked. If choked flow occurs, then the * is dropped from the superscripts at location 2 for simplicity. ΣK m represents losses due to elbows and the pipe entrance.
Which is the parameter that becomes choked in choked flow?
Choked flow is a compressible flow effect. The parameter that becomes “choked” or “limited” is the fluid velocity. Choked flow is a fluid dynamic condition associated with the venturi effect.
What happens when gas is choked in thin plate orifice?
The flow of real gases through thin-plate orifices never becomes fully choked. The mass flow rate through the orifice continues to increase as the downstream pressure is lowered to a perfect vacuum, though the mass flow rate increases slowly as the downstream pressure is reduced below the critical pressure.
What happens if you use fuel hose instead of vacuum hose?
As your engine is running and creating that vacuum on the booster, it is going to try and close the hose. If you are mistakenly using fuel hose, there is a good chance your hose is closing shut. This creates a very inconsistent and possibly hard pedal.
Why does my vacuum hose keep closing shut?
Vacuum hose needs to resist sucking shut. As your engine is running and creating that vacuum on the booster, it is going to try and close the hose. If you are mistakenly using fuel hose, there is a good chance your hose is closing shut. This creates a very inconsistent and possibly hard pedal.
What to look for in a vacuum hose?
That is opposite of what you are looking for in a vacuum hose. Vacuum hose needs to resist sucking shut. As your engine is running and creating that vacuum on the booster, it is going to try and close the hose. If you are mistakenly using fuel hose, there is a good chance your hose is closing shut.
What to do if your vacuum fuel petcock is bad?
The easiest way to fix this is to check to see if the vacuum fuel petcock is faulty. These vacuum on/off switched valves/petcocks can be found on everything from GY6 Scooters to Kawasaki Mules. From motorcycles to generators. If you smell or see gas in the vacuum line on the petcock then it is for sure bad.