Compatibility of Methane Fuel with LOX/Methane Engine Combustion Chamber Cooling Channels

Azuma, Nobuyuki; Sato, Masaki; Tadano, Makoto; Sato, Masahiro; Masuoka, Tadashi; Moriya, Shinichi; Aoki, Kenji; Kawashima, Hideto; Yoshida, Makoto; Okita, Koichi; Tamura, Tadashi; Niu, Kenichi

doi:10.2514/6.2008-4838

Cited by 8 publications

(3 citation statements)

References 1 publication

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“…However, it is important to note that even the components of lower content (like heavier hydrocarbons or sulfur traces) could affect the heat transfer because of coking phenomena or sulfur attack to the wall. These aspects have been addressed in several studies available in literature 34,35 and are besides the scope of the present investigation. Among the LNG mixture compositions found in the literature, the composition listed in Table 3 have been used for a first set of numerical simulations.…”

Section: Lng Compositionsmentioning

confidence: 95%

Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Urbano

Nasuti

2012

Proceedings of the Institution of Mechanical Engineers, Part G:

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Liquefied natural gas is a suitable propellant to be used, together with liquid oxygen as oxidizer, in a liquid rocket engine, because of possible advantages with respect to hydrogen in specific applications. Often approximated as pure methane, liquefied natural gas is a mixture of methane, other heavier hydrocarbons and nitrogen. If is to be used in a regeneratively cooled liquid rocket engine, the knowledge of the thermodynamic and heat transfer characteristics when it flows in the cooling channels is of primary importance. The present study is carried out to understand how the composition can influence the flow in cooling channels. Results show that increasing ethane and propane content in a mixture, the pressure drop decreases but the coolant capability worsens. On the other hand increasing nitrogen content causes both poorer coolant capability and larger pressure drop

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Section: Lng Compositionsmentioning

confidence: 95%

Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Urbano

Nasuti

2012

Proceedings of the Institution of Mechanical Engineers, Part G:

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“…[6][7][8] Although many studies on rocket engine cooling channels fed with supercritical fluids have been carried out for hydrogen used in LOX/LH 2 engines and for nitrogen used in many cryogenic-research laboratories, only a small amount of experimental investigations on supercritical-methane flow inside cooling channels can be found in the literature. [9][10][11][12][13] Moreover, these studies do not refer to rectangular cross section cooling channels, which are of great interest in rocket engine applications. The Italian interest on methane as coolant for liquid rocket engine cooling channels is found within the HYPROB program, which is carried out by CIRA under contract by the Italian Ministry of Research.…”

Section: Introductionmentioning

confidence: 99%

Supercritical Methane Heat Transfer Modeling in Rocket Engine Cooling Channels

Pizzarelli¹,

Nasuti

Oiioin

et al. 2013

49th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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Liquid propellants, which are typically used for regenerative cooling of rocket thrust chambers, can flow in channels at supercritical pressures and in the neighborhood of pseudo-critical temperature (near-critical fluid). This could be for instance the case for the envisioned liquid-oxygen/liquid-methane engines with chamber pressures larger than about 50 bar. When the fluid is in such a near-critical condition, deterioration in heat transfer can occur if the heat transfer level is higher than a threshold value. In this study detailed three-dimensional numerical analyses are performed to study the coupled wall/coolant environment of an electrically-heated test article designed in order to investigate the thermo-fluid dynamic behavior of methane inside a rectangular cooling channel which can be representative of a regenerative system. Different coolant pressure and surface roughness levels are considered in order to understand their influence on the heat transfer capability of the cooling system. Results evidence that the heat transfer deterioration can be mitigated either by increasing the coolant pressure or by increasing the surface roughness. In the latter case, a penalty in terms of coolant pressure drop is expected.

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“…It is well known that combustion chamber was lined by a thin copper sheet with cooling channels supported by the high strength steel wall of the chamber [3]. The inner metal requires mechanical support at high temperature to maintain the compressive loading due to the propellant's pressure and also requires high thermal conductivity to effectively dissipate the heat produced inside of the chamber.…”

Section: Introductionmentioning

confidence: 99%

A study on diffusion bonding of steel and copper alloy

Lee

Yoo

2011

Materialwissenschaft Werkst

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In combustion chamber of liquid propellant launch vehicle, the inner shell of the chamber is copper alloy with cooling channels for regenerative cooling and outer shell is steel to maintain high pressure inside the chamber. The purpose of this study is to find the optimum condition for diffusion bonding of copper and steel and the experimental conditions were 3 different pressures at temperatures from 800 8C to 950 8C. In order to characterize the flow strength of materials at high temperatures, several tensile tests were performed at several temperatures from 800 8C to 950 8C. This information is used to estimate the test condition for diffusion bonding and superplastic forming. Mechanical properties of bonded specimen were evaluated with single lap joint tests and shear tests. Microstructure of bonded layer has been also observed with SEM with EDX. It is shown that the optimum condition of diffusion bonding is 7 MPa at 890 8C, for one hour. Pressurization test of bonded specimen with cooling channels was performed with hydraulic pressure of 87 MPa without failure.

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Compatibility of Methane Fuel with LOX/Methane Engine Combustion Chamber Cooling Channels

Cited by 8 publications

References 1 publication

Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Numerical study of liquefied natural gas as a coolant in liquid rocket engines

Supercritical Methane Heat Transfer Modeling in Rocket Engine Cooling Channels

A study on diffusion bonding of steel and copper alloy

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