Questions tagged [turbopump]

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2
votes
2answers
120 views

Is it possible to use hybrid propulsion to drive the turbopump?

Turbopump are driven either by a preburner or by an electrical engine (OK this technology is quite new and currently in 2019 only used on the Rutherford engine). If I understand correctly, using ...
3
votes
1answer
113 views

Does engine purging cause dry run of turbo pump in a liquid rocket engine? If it occurs, what is the implication?

Does engine purging in a liquid rocket engine cause dry run of the turbopump? If so, does that have any implication for the design, health, maintenance, or operation of the pump? How do we calculate ...
4
votes
3answers
224 views

How much of the exhaust speed is due to combustion and how much is due to the injection?

The thrust $F$ of a rocket engine is given by $$F=\dot{m}v$$ where $\dot{m}$ is the mass flow and $v$ is the exhaust speed. Now the first factor, $\dot{m}$, is almost entirely due to the turbo pumps (...
4
votes
1answer
86 views

How do pressure fed and pump fed systems compare at different scale of rockets

Rocket Design is all about optimising mass, within cost constraints while accepting a certain amount of risk. Both pressure fed and pump fed systems have their pros and cons, but how do they compare ...
3
votes
0answers
202 views

How does a turbopump work

I am a kid pursuing a career in propulsion, and I was wondering, "how does a turbopump work?" I would really appreciate a detailed explanation. Thanks!
1
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0answers
57 views

What is the geometric dimensions of turbo pumps present in SSME?

Here is a really well documented and detailed explanation of the SSME engine. Looking through this, one can notice that there are no details of the dimensions. I would like to know about the ...
3
votes
1answer
148 views

What is advantage of independent pumps vs common pump in clustered configuration?

The images of the engine clustering in the Rocket Labs's Electron rocket gives an indication that there are independent drive pumps for individual engines; I am not sure of it. I am not aware of the ...
2
votes
1answer
459 views

Mass, Chamber pressure and cooling type of Rutherford Engine

What are the specifications of Rocket Lab's Rutherford Engine used by the Electron Rocket? I'm looking for the chamber pressure, propellant mass flow rate, type of cooling for the nozzle, size of ...
1
vote
0answers
43 views

Pressure queries on turbopumps

In the turbopump used in liquid rockets, the stagnation pressure rise is definite. But then the question comes: Whether static pressure rises or dynamic pressure rises or both rise? If both rise ...
1
vote
2answers
84 views

General queries on pumps

What will be the result if the pipe losses is greater than head produced by the pump? What will be the result if outlet is closed?
1
vote
1answer
82 views

Pressure in the turbopump

Which pressure is considered, when using the head calculation (stagnation or static)? Are these pressures absolute or gauge?
1
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0answers
54 views

Cryogenic engines till date

How many cryogenic engines are there till date. Names are mostly necessary.
1
vote
0answers
36 views

How do preburners work in gas generator cycle? [duplicate]

In gas generator cycle small portion of the fuel and oxidzier is burned in the preburner to drive centrifugal pumps feeding the main combustion chamber. But how is the fuel/oxidizer fed into the ...
6
votes
0answers
144 views

Why aren't injector pumps used in rockets?

Is there something that makes injectors unsuitable as oxidizer pumps? Seems to me that rockets would benefit significantly from a pump with no moving parts that runs off its own exhaust.
4
votes
1answer
727 views

At what pressure ratio did the fuel turbopumps of the F1 and J2 operate?

I would like to know the operating points of the fuel-turbo-pumps used in the Saturn rocket engine. (From what I could learn via google, the turbo pump went under the name Mark III) Is there any ...
6
votes
3answers
967 views

How does the propellant flow during descent on SpaceX's Falcon 9 first stage?

Could someone explain to me how, during the descent, the pumps pull the oxidizer and propellant? I could be wrong, but during the burn the propellant should move inside an almost empty tank.
6
votes
1answer
478 views

What are the issues and concerns related to turbopump blade cracks and manned spaceflight?

While the WSJ headline sounds ominous: Congressional Investigators Warn of SpaceX Rocket Defects, Quartz's SpaceX needs to redesign its engine to ensure it is safe for human spaceflight seems to be a ...