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- Newsgroups: sci.space
- Path: sparky!uunet!boulder!ucsu!ucsu.Colorado.EDU!fcrary
- From: fcrary@ucsu.Colorado.EDU (Frank Crary)
- Subject: Re: Pumpless Liquid Rocket?
- Message-ID: <1992Nov23.201538.17170@ucsu.Colorado.EDU>
- Sender: news@ucsu.Colorado.EDU (USENET News System)
- Nntp-Posting-Host: ucsu.colorado.edu
- Organization: University of Colorado, Boulder
- References: <1992Nov23.160859.9657@cs.ucf.edu>
- Date: Mon, 23 Nov 1992 20:15:38 GMT
- Lines: 26
-
- In article <1992Nov23.160859.9657@cs.ucf.edu> clarke@acme.ucf.edu (Thomas Clarke) writes:
- >I was thinking about the problem
- >of pumping in a liquid fuel rocket
- >and wondered if there might be an
- >alternative to fragile turbo pumps
- >or heavy pressurized tanks.
-
- >[Description of a gravity-fed rocket deleted.]
-
- >That is connect the tankage to the rocket engine
- >with a long pipe. When accelerating (or at
- >rest in a gravity field) hydrostatic pressure
- >at bottom of pipe can be fairly high...
-
- This system has two disagvantages: As acceleration changes, the pressure
- (and therefore the fuel flow rate and a few other characteristics of
- the combustion) will also change; also the system will not function in
- zero-gravity.
-
- An alternative is a pressure-fed system: A compressed, inert gas (He and
- N are popular) is used to keep the fuel tank at some constant pressure,
- and thereby force a flow into the lower pressure combustion chamber.
-
- Frank Crary
- CU Boulder
-
-