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I'm wondering if we have a number of sources that refer to this as a pressure-fed cycle rather than a pressure-fed engine? In the literature, it seems to be used to define a type of engine, and the pressure-fed/ pump-fed distinction does not seem to actually be about the thermodynamic cycle at all, but rather just a source for the pressure to drive the propellant into the combustion chamber.
The article itself mentions "cycle" only once, in the obligatory first line of the lede where the article title is supposed to be recapitulated. Yet it mentions pressure-fed engine or design several times.
If I'm right about this, then the name of the article may just be an inadvertent artifact of how the article was originally created in Wikipedia, and it might be time for a move to make the article name more in line with the terminology that is widely used in the rocket engine technical literature.
Anyone have good sources that show this commonly referred to as a cycle? Cheers. N2e ( talk) 15:48, 22 November 2013 (UTC)
"When a system in a given initial state goes through a number of different changes of state or processes and finally returns to its initial state, the system has undergone a cycle. Therefore, at the conclusion of a cycle all the properties have the same value they had at the beginning. Steam (water) that circulates through a steam power plant undergoes a cycle.
A distinction should be made between a thermodynamic cycle, which has just been described, and a mechanical cycle. A four-stroke cycle internal combustion engine goes through a mechanical cycle once every two revolutions. However, the working fluid does not go through a thermodynamic cycle in the engine, since air and fuel are burned and changed to products of combustion which are exhausted to the atmosphere. In this text the term cycle will refer to a thermodynamic 'cycle' unless otherwise designated." (emphasis added)
(here I am restating the question, without my mis-presumption about thermodynamic cycles)
I'm wondering if we have sources that refer to this as a pressure-fed cycle rather than a pressure-fed engine? In the limited rocket engine literature I've run into (admittedly, only a few AIAA papers), the term seems to be used to define a type of engine, and the pressure-fed/ pump-fed distinction does not seem to actually be cycle of the rocket engine at all, but rather just a source of power for the fluid pressure to drive the propellant into the combustion chamber.
The article itself mentions "cycle" only twice , in the obligatory first line of the lede where the article title is supposed to be recapitulated, and in an introductory sentence to a list of pressure-fed engines at the end of the body of the article. Yet the article mentions pressure-fed engine (or pressure-fed engine, pressure-fed engines, or pressure-fed liquid fuel engines) five times.
If so, then the name of the article may just be an inadvertent artifact of how the article was originally created in Wikipedia, and it might be time for a move to make the article name more in line with the terminology that is widely used in the rocket engine technical literature.
So, still looking for any sources in the literature that show this is commonly referred to as a cycle. N2e ( talk) 12:51, 23 November 2013 (UTC)
Forgive my limited understanding of the subject matter, but isn't one of the fundamental advantages of pressure-feeding the lack of ullage problems, at least when you keep the fuel in a bladder? Ullage is currently not mentioned in the article. For RCS specifically, it'd be very detrimental to have the requirement of ullage motors (since RCS is often to provide the functionality of ullage motors to other engines). Again, my understanding is very limited, and I am simply wondering if (a) this assessment is correct and (b) it should be included in the article. -- Tobias ( Talk) 04:16, 8 April 2016 (UTC)
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I'm wondering if we have a number of sources that refer to this as a pressure-fed cycle rather than a pressure-fed engine? In the literature, it seems to be used to define a type of engine, and the pressure-fed/ pump-fed distinction does not seem to actually be about the thermodynamic cycle at all, but rather just a source for the pressure to drive the propellant into the combustion chamber.
The article itself mentions "cycle" only once, in the obligatory first line of the lede where the article title is supposed to be recapitulated. Yet it mentions pressure-fed engine or design several times.
If I'm right about this, then the name of the article may just be an inadvertent artifact of how the article was originally created in Wikipedia, and it might be time for a move to make the article name more in line with the terminology that is widely used in the rocket engine technical literature.
Anyone have good sources that show this commonly referred to as a cycle? Cheers. N2e ( talk) 15:48, 22 November 2013 (UTC)
"When a system in a given initial state goes through a number of different changes of state or processes and finally returns to its initial state, the system has undergone a cycle. Therefore, at the conclusion of a cycle all the properties have the same value they had at the beginning. Steam (water) that circulates through a steam power plant undergoes a cycle.
A distinction should be made between a thermodynamic cycle, which has just been described, and a mechanical cycle. A four-stroke cycle internal combustion engine goes through a mechanical cycle once every two revolutions. However, the working fluid does not go through a thermodynamic cycle in the engine, since air and fuel are burned and changed to products of combustion which are exhausted to the atmosphere. In this text the term cycle will refer to a thermodynamic 'cycle' unless otherwise designated." (emphasis added)
(here I am restating the question, without my mis-presumption about thermodynamic cycles)
I'm wondering if we have sources that refer to this as a pressure-fed cycle rather than a pressure-fed engine? In the limited rocket engine literature I've run into (admittedly, only a few AIAA papers), the term seems to be used to define a type of engine, and the pressure-fed/ pump-fed distinction does not seem to actually be cycle of the rocket engine at all, but rather just a source of power for the fluid pressure to drive the propellant into the combustion chamber.
The article itself mentions "cycle" only twice , in the obligatory first line of the lede where the article title is supposed to be recapitulated, and in an introductory sentence to a list of pressure-fed engines at the end of the body of the article. Yet the article mentions pressure-fed engine (or pressure-fed engine, pressure-fed engines, or pressure-fed liquid fuel engines) five times.
If so, then the name of the article may just be an inadvertent artifact of how the article was originally created in Wikipedia, and it might be time for a move to make the article name more in line with the terminology that is widely used in the rocket engine technical literature.
So, still looking for any sources in the literature that show this is commonly referred to as a cycle. N2e ( talk) 12:51, 23 November 2013 (UTC)
Forgive my limited understanding of the subject matter, but isn't one of the fundamental advantages of pressure-feeding the lack of ullage problems, at least when you keep the fuel in a bladder? Ullage is currently not mentioned in the article. For RCS specifically, it'd be very detrimental to have the requirement of ullage motors (since RCS is often to provide the functionality of ullage motors to other engines). Again, my understanding is very limited, and I am simply wondering if (a) this assessment is correct and (b) it should be included in the article. -- Tobias ( Talk) 04:16, 8 April 2016 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Pressure-fed engine. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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(last update: 18 January 2022).
Cheers.— InternetArchiveBot ( Report bug) 07:44, 11 November 2017 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Pressure-fed engine. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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Cheers.— InternetArchiveBot ( Report bug) 09:28, 23 January 2018 (UTC)