What is a single spool engine?
“Spool” is engineering shorthand for the combination of an engine compressor and high-pressure turbine that drives it using a connecting drive shaft. In a single-spool engine, the high-pressure turbine drives the entire compressor.
What is a single spool compressor?
A single spool core means that all rotating components in the compressor and the gas generator are on one shaft and rotate at the same speed. In contrast, a dual spool core splits the compressor into two independently spinning rotors that are each powered by a separate gas generator turbine on concentric shafts.
What is a twin spool gas turbine?
A twin spool design normally has the front compressors attached to the rear turbines using an inner shaft, with a higher pressure compressor and a higher pressure turbine connected with an outer shaft.
How does an axial flow compressor work?
An axial-flow compressor compresses its working fluid by first accelerating the fluid and then diffusing it to obtain a pressure increase (Chapter 7). The fluid is accelerated by a row of rotating airfoils or blades (the rotor) and diffused by a row of stationary blades (the stator).
What is axial-flow air compressor?
An axial-flow compressor is one in which the flow enters the compressor in an axial direction, and exits from the gas turbine also in an axial direction. The axial-flow compressor compresses its working fluid by first accelerating the fluid and then diffusing it to obtain a pressure increase.
What are the advantages of using multi spool axial flow compressor?
Modern engines can use 10-15 compressor stages. Advantages of the axial compressor are its higher flow rate and greater pressure ratio, which results in higher thrust and fuel efficiency. This makes it better suited to applications where the thrust of the engine itself is the motive force for the aircraft.
What is the rpm of a 747 engine?
Core of the engine is about 3000 – 3500 rpm. The fan speed is limited by aerodynamics and at high RPM starts to develop shockwaves on the leading edge of the fan blades.
How do microturbines work?
Microturbines are a relatively new distributed generation technology being used for stationary energy generation applications. They are a type of combustion turbine that produces both heat and electricity on a relatively small scale. Microturbines work like jet engines but produce electricity instead of thrust.
What is an engine spool valve?
A spool valve is part of a hydraulic system that directs the flow of hydraulic fluid. The valve is made up of spools that rotate or slide to block and open channels in a hydraulic system.
What is a single spool hydraulic valve?
Single spool hydraulic valve is a device used to control hydraulic systems. Single spool hydraulic valve can manage the flow of hydraulic fluid from a hydraulic pump to an actuator. It can be open or closed, blocking of the route the fluid takes.
How is a single spool engine different from a dual spool?
In a single-spool engine, the high-pressure turbine drives the entire compressor. In a dual-spool engine, the compressor and high-pressure turbine are both split into two segments. Each compressor segment is driven by its corresponding turbine using two separate drive shafts, with one inside the other.
What does a spool mean in an engine?
“Spool” is engineering shorthand for the combination of an engine compressor and high-pressure turbine that drives it using a connecting drive shaft. In a single-spool engine, the high-pressure turbine drives the entire compressor.
How does a twin spool turbine engine work?
Twin spool Compressor Engine A twin spool design normally has the front compressors attached to the rear turbines using an inner shaft, with a higher pressure compressor and a higher pressure turbine connected with an outer shaft.
How does a single spool core compressor work?
A single spool core means that all rotating components in the compressor and the gas generator are on one shaft and rotate at the same speed. In contrast, a dual spool core splits the compressor into two independently spinning rotors that are each powered by a separate gas generator turbine on concentric shafts.