What is combustion instability in rocket engine?
In the simplest view, combustion instability can be thought of as pressure swings in the engine caused by the multiple streams of liquid oxygen and rocket fuel combining and igniting at extremely high pressures in such a way that causes violent vibrations.
What is combustion instability?
Combustion instabilities are physical phenomena occurring in a reacting flow (e.g., a flame) in which some perturbations, even very small ones, grow and then become large enough to alter the features of the flow in some particular way.
What is the main problem with chemical rocket engines?
A notable issue with chemical rockets is that the mass of the fuel required (for a given payload) scales exponentially with the final speed that one wishes to achieve.
What are the advantages of liquid propellant system over solid propellant system?
Major advantages of liquid propellant rockets are that they generally have higher specific impulses than solids, the thrust can be throttled, the system can be restarted as often as designed, and the flow of propellants can be monitored and regulated to precisely control the magnitude of the thrust.
What is acoustic instability?
Abstract. Combustion-acoustic. instabilities occur when the. acoustic energy increase due to the unsteady heat release of the flame is greater than the losses of acoustic energy from the system.
What are the disadvantages of liquid propellant rocket engine?
Disadvantages of liquid propellant rockets include requirements for complex storage containers, complex plumbing, precise fuel and oxidizer injection metering, high speed/high capacity pumps, and difficulty in storing fueled rockets.
What are the differences between electric propulsion and chemical rocket propulsion?
While chemical propulsion systems store their energy in the propellants, the energy required by electric propulsion systems is generated by solar panels. The use of solar panels to supply power to an electric propulsion system is referred to as solar electric propulsion (SEP).
Is nuclear propulsion possible?
Nuclear thermal propulsion (NTP) systems aren’t new, but they could significantly reduce travel times and carry greater payloads than today’s top chemical rockets — giving humans a great chance of exploring deep space.