All Questions
Tagged with propulsionliquid-fuel
28 questions
19votes
2answers
2kviews
What purity of LOX is required for use in rocket engines?
Can any one suggest, is it necessary to check purity of LOX before it is used in an engine? What are the impurities which can affect its performance? What types of tests can we perform to check its ...
2votes
0answers
63views
Technical Question on Ignition Back Pressure
I am looking for understanding the backpressure or pressure stabilization of the injector inlet of the engines, during ignition (T-0). Are there books or papers that you suggest to check for ...
- 171
8votes
1answer
2kviews
What is the maximum number of times a liquid rocket engine has detonated/ exploded during development?
My question comes from a lot of research and curiosity. Do they stop the development process at 10-20 detonations/ explosions? Or do they keep continuining solving one problem after the other. Modern ...
- 171
11votes
1answer
720views
Has a rocket engine with LOX as the oxidizer ever fired beyond the GEO belt?
Intuitive Machines' Nova-C lunar lander is scheduled to launch in mid-February of this year. Notably, the lander uses liquid methane as fuel and liquid oxygen as the oxidizer, and it will rely on this ...
- 1,140
1vote
3answers
754views
Propellant Density Calculation for LOX/Kero
I am trying to make sense of the equation for propellant density calculation, rho=(rw-1)/(rw/bo+1/bf). Sutton, 7th edition, gives this equation (7-2) as: $ \ \ \ \rho_{av} = \frac {\rho_o\rho_f(1+r)} {...
- 41
2votes
1answer
538views
Is adiabatic flame temperature the same as nozzle stagnation temperature?
I am trying to understand whether these two concepts are in fact, the same parameter. The way I see it, the adiabatic flame temperature is the highest temperature achieved by stoichiometric combustion ...
- 21
7votes
1answer
766views
Is it more expensive to send a chemical rocket from surface of Earth to an orbit or from this orbit to Mars?
I was trying to understand how cost-effective it would be to use an ion engine to power a mission. But since these propulsion systems cannot be used to leave Earth's gravitational field due to their ...
- 469
3votes
1answer
75views
How to predict reaction of propellants at chamber temperature and pressure? [duplicate]
I would like to understand how to calculate the complete reaction of propellants at chamber temperature and pressure. For instance taking ethyl alcohol (75%) and LOX combustion with mixture ratio of 1....
- 43
1vote
1answer
204views
What differences exist between the pressurants and their associated systems between a pressure fed and pump fed liquid rocket engine
There is an apparent need to have pressurants in both pressure fed and pump fed systems. However, since pump fed systems can create the necessary pressure, they can work with less pressurants and ...
- 1,251
3votes
1answer
442views
What happens when LOX and H2 are injected into the combustion chamber of a rocket?
I can't seem to find an answer on this. I thought that when oxygen and hydrogen get injected they collide and break bonds etc. to form water vapour which because of the pressure in the combustion ...
- 31
2votes
1answer
188views
Can I able to use RP 1 and LOX in metal tin small size rockets? Is that possible? [closed]
I love rockets. Planning to build a tin rocket but not with water and air pressure. I would like to build a small metal tin rocket using fuel as RP 1 and oxidizer as LOX. I know this is too hazardous ...
2votes
0answers
112views
Effect of the location of igniter in starting liquid rocket engine
What will be the effect of off axis igniter, say a Spark igniter has to be used along with a pintle? Will the igniter being off axis have any effect on engine start? Also, will an off-center igniter ...
- 4,499
6votes
1answer
756views
Which is the preferred mode of liquid rocket engine cutoff - fuel lean cutoff or fuel rich cutoff?
When a bi-propellant liquid rocket engine receives a command to shut down, will the fuel gets cut off first and then the oxidiser - a fuel lean cutoff? Will the oxidiser gets cut off first and then ...
- 4,499
14votes
5answers
1kviews
If LOX/LH2 were used in a fuel cell powering an ion engine could it provide a greater delta-v than with a conventional engine?
Question: If LOX/LH2 were used in a fuel cell powering an ion engine could it provide a greater delta-v than with a conventional engine? Conditions: Start in space in a stable heliocentric orbit (no ...
- 153k
3votes
1answer
543views
How to calculate mass of fuel for Venus Orbiter
I'm working on a hypothetical constellation of orbiters at Venus for a school project, and I am currently trying to figure out how much fuel I need in the transfer stage. I have already calculated ...
