All Questions
Tagged with propulsioncombustion
12 questions
1vote
0answers
51views
Were top-ranked launch propulsion technologies, TBCC and RBCC, already flight-proven in 2012 when the NASA Space Technology report was published?
The publication, "NASA Space Technology Roadmaps and Priorities: Restoring NASA's Technological Edge and Paving the Way for a New Era in Space (2012)" states that NASA's top technical ...
- 9,353
2votes
2answers
599views
Do full flow rocket engines still use injectors? If so, how? How exactly are the oxidizer and fuel sent into the combustion chamber?
I'm learning about rocket engines and full flow engines, and I'm a little confused about what goes on in the combustion chamber. It was my understanding that injectors were pretty much necessary to ...
- 21
1vote
1answer
449views
nozzle throat area calculation for choked flow
I am quite confused for my sugar propellant rocket nozzle. I have designed a CD nozzle by hit and trial method. It worked but produced so less amount of thrust .I have used 2.3 kg propellant which ...
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
3votes
2answers
362views
Is presssuized gas absent in a turbopump-driven rocket engines?
For RL-10 rocket engines, are the propellent pumps able to provide the propellent without a source of pressurant gas?
- 489
16votes
2answers
2kviews
How do you confirm ignition in the combustion chamber of a rocket?
Is ignition confirmed using a temperature sensor, pressure sensor or another device?
- 357
5votes
1answer
5kviews
How are the combustion chamber length and diameter decided
How are the combustion chamber length and diameter decided? Are there any proper formulations or procedures?
- 2,254
5votes
0answers
233views
What is the droplet size that is desirable for pintle injectors?
The pintle injectors tend to generate droplets after impingement of the fuel and the oxidiser stream and I understand that the droplets will be premixed. In such a case, even a larger premixed ...
- 4,499
3votes
2answers
1kviews
What are the choice of materials for LOx pumps casing and impellers?
Given the highly corrosive nature of LOx and the extremely low temperature, what materials are usually used for the LOx pumps? Steel, Copper, and many alloy tend to be flammable in liquid Oxygen ...
- 4,499
2votes
1answer
1kviews
Why spray LOx into combustion chamber, if GOx is more effective?
Are there any issues in transforming the liquid oxygen into gaseous oxygen before injecting into the combustion chamber? Gaseous Oxygen will be readily available for combustion and will mix well with ...
- 4,499
18votes
2answers
9kviews
What are the advantages of Ox-rich staged combustion?
In the context of staged combustion, I understand that burning ox-rich creates complications associated with having hot, high pressure, oxidizer. Some engines, notably the RD-170 and RD-180 family run ...
2votes
2answers
761views
Could chemical energy quicken ion propulsion?
Background Tsiolkovski's rocket equation says that change of speed is proportional to the exhaust velocity. Chemical propulsion seems to have a strictly limited and since long achieved maximum ...
- 27.1k
