Table of Contents
- 1 What is SFC in jet engine?
- 2 How is SFC calculated?
- 3 What is the formula for specific fuel consumption SFC?
- 4 What is specific fuel consumption of diesel?
- 5 How far can a car travel with 1 Litre of petrol?
- 6 What is a good fuel consumption per 100km?
- 7 How do I calculate specific fuel consumption?
- 8 Why is specific fuel consumption important?
- 9 What does TSFC stand for in gas turbine engine?
- 10 What is the specific fuel consumption of a jet engine?
What is SFC in jet engine?
TSFC or SFC for thrust engines (e.g. turbojets, turbofans, ramjets, rocket engines, etc.) is the mass of fuel needed to provide the net thrust for a given period e.g. lb/(h·lbf) (pounds of fuel per hour-pound of thrust) or g/(s·kN) (grams of fuel per second-kilonewton). …
How is SFC calculated?
The units of this efficiency factor are mass per time divided by force (in English units, pounds mass per hour per pound; in metric units, kilograms per hour per Newton).
Is TSFC a constant?
However, TSFC is roughly a linear function of speed. Related to b) it was found that the academically taught optimum flight speed (1.316 times minimum drag speed) for maximum range of jet airplanes is inaccurate, because the derivation is based on the unrealistic assumption of TSFC being constant with speed.
What is the formula for specific fuel consumption SFC?
In traditional units, it measures fuel consumption in pounds per hour divided by the brake horsepower, lb/(hp⋅h); in SI units, this corresponds to the inverse of the units of specific energy, kg/J = s2/m2. It may also be thought of as power-specific fuel consumption, for this reason.
What is specific fuel consumption of diesel?
The lower the brake specific fuel consumption, the more efficient the engine is. For spark ignition (gasoline engine) the BSFC is around 250 g/kWh and for compression ignition (diesel) around 200 g/kWh.
How do I find specific fuel consumption?
Simple Method
- Formula To Estimate Maximum Engine Fuel Consumption. Gallon Per Hour (GPH) = (specific fuel consumption x HP)/Fuel Specific Weight.
- 300-hp Diesel Engine Example. GPH = (0.4 x 300)/ 7.2 = 105/7.2 = 16.6 GPH.
- 300-hp Gasoline Engine Example. GPH = (0.50 x 300)/ 6.1 = 150/6.1 = 24.5 GPH.
- Other Related Resources:
How far can a car travel with 1 Litre of petrol?
The actual formula to get km per litre is 100 divided by 8 = 12.5 (Your car will give you 12.5 km on one litre).
What is a good fuel consumption per 100km?
In general, 5-8 liters per 100 km is considered a good fuel efficiency, 8-12 liters per 100 km would be average, and more than 12 liters per 100 km would be considered a relatively low fuel efficiency.
What causes high fuel consumption in diesel engines?
Meanwhile, “in a diesel engine, an increase of fuel consumption can result from dirty fuel injectors and air cleaner element as these two are crucial for prompt burning of the fuel during combustion.” The quality of engine oil you choose to use in your engine can also affect fuel economy.
How do I calculate specific fuel consumption?
Why is specific fuel consumption important?
Specific fuel consumption (SFC) is one of the most important metrics employed in aviation. It is important not only in aircraft design but also in the operation of the aircraft. First and foremost, SFC indicates how efficiently a power plant converts chemical into mechanical energy.
How is TSFC related to thrust specific fuel consumption?
TSFC may also be thought of as fuel consumption (grams/second) per unit of thrust (kilonewtons, or kN). It is thus thrust-specific, meaning that the fuel consumption is divided by the thrust.
What does TSFC stand for in gas turbine engine?
The thrust of TSFC is included to indicate that we are talking about gas turbine engines. There is a corresponding brake specific fuel consumption ( BSFC) for engines that produce shaft power. Gathering all the terms together, TSFC is the mass of fuel burned by an engine in one hour divided by the thrust that the engine produces.
What is the specific fuel consumption of a jet engine?
Background The Specific Fuel Consumption (SFC) of a jet engine cis defined per thrust and called more precisely also Thrust-specific Fuel Consumption (TSFC). This common definition comes from the fact that thrust (and not power) is measured on jet engine test stands.
What’s the difference between TSFC and TSFC specific?
The fuel consumption of TSFC is “how much fuel the engine burns each hour.”. The specific of TSFC is a scientific term meaning “divided by mass or weight.”. In this case, specific means “per pound (Newton) of thrust.”.