scispace - formally typeset
Search or ask a question
Topic

Gas compressor

About: Gas compressor is a research topic. Over the lifetime, 91817 publications have been published within this topic receiving 552209 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, an advanced version of a three-equation eddy-viscosity model is proposed to resolve boundary layer transition in both steady and unsteady compressor aerosimulations.
Abstract: Recent experimental work has documented the importance of wake passing on the behavior of transitional boundary layers on the suction surface of axial compressor blades. This paper documents computational fluid dynamics (CFD) simulations using a commercially available general-purpose CFD solver, performed on a representative case with unsteady transitional behavior. The study implements an advanced version of a three-equation eddy-viscosity model previously developed and documented by the authors, which is capable of resolving boundary layer transition. It is applied to the test cases of steady and unsteady boundary layer transition on a two-dimensional flat plate geometry with a freestream velocity distribution representative of the suction side of a compressor airfoil. The CFD results are analyzed and compared to a similar experimental test case from the open literature. Results with the model show a dramatic improvement over more typical Reynolds-averaged Navier-Stokes (RANS)-based modeling approaches, and highlight the importance of resolving transition in both steady and unsteady compressor aerosimulations.

82 citations

Journal ArticleDOI
TL;DR: In this article, a new model based on evolved GMDH neural network for transient evolution of multiple short-length-scale stall cells in an axial compressor was proposed, and genetic algorithms were employed for optimal design of connectivity configuration of such GMDH-type neural networks.

82 citations

Patent
06 Sep 2002
TL;DR: In this article, a pressure sensor is used to determine the actual flow of combustion airflow in response to actual space conditions, vary the speed of the inducer blower and subsequently vary the gas valve output to supply the correct amount of gas to the burner system.
Abstract: A heating or cooling system, such as an HVAC system, of variable output has a number of control elements and may include a variable speed compressor, a variable speed combustion (induced or forced draft) blower motor; a variable speed circulator blower motor; a variable output gas valve or gas/air premix unit; and a controller specifically developed for variable output applications. The system may utilize a pressure sensor to determine the actual flow of combustion airflow in response to actual space conditions, vary the speed of the inducer blower, and subsequently vary the gas valve output to supply the correct amount of gas to the burner system. A temperature sensor may be located in the discharge air stream of the conditioned air to provide an input signal for the circulator blower.

82 citations

Patent
30 Sep 1981
TL;DR: A gas compressor has at least one closed container with gas inlet means for filling the container with a gas to be compressed and gas outlet means through which compressed gas can leave the container as mentioned in this paper.
Abstract: A gas compressor has at least one closed container with gas inlet means for filling the container with a gas to be compressed and gas outlet means through which compressed gas can leave the container. When the container has been filled with gas to be compressed, a fluid is forced into the container to compress the gas therein and force it out of the container. After the container has been filled with fluid and the gas forced therefrom, the fluid is drained while gas again enters and fills the container. The output of the container is generally connected to a gas storage tank and the cycle of filling the container with gas and then expelling it is repeated until a desired pressure of gas is obtained in the storage tank. The compressor is particularly suited to filling a storage tank, such as a natural gas storage tank in a vehicle, over an extended period of time of several hours. However, a unique auxilary storage tank may be used with the compressor to provide for fast filling of another storage tank, such as the vehicle tank, by transferring substantially the entire contents of the first storage tank to the second storage tank. Such transfer is accomplished by progressively reducing the storage space of the storage tank, thus forcing the stored gas into the second tank. This is preferably done by filling the tank with a fluid, thereby forcing the gas out.

82 citations

Patent
08 Jun 2015
TL;DR: In this paper, the authors present a system for treating liquefied gas, which includes an evaporation gas supply line connected from a LNG storage tank to a LPG consumer.
Abstract: According to an embodiment of the present invention, a system for treating liquefied gas includes: an evaporation gas supply line connected from a liquefied gas storage tank to a liquefied gas consumer; an evaporation gas compressor provided on the evaporation gas supply line, and configured to compress evaporation gas generated from the liquefied gas storage tank; an evaporation gas heat exchanger provided in the upstream of the evaporation gas compressor on the evaporation gas supply line, and configured to perform heat exchange between evaporation gas compressed by the evaporation gas compressor and collected along an evaporation gas collect line branching off from the upstream of the liquefied gas consumer, and evaporation gas supplied from the liquefied gas storage tank; a Joule-Thomson valve provided in the downstream of the evaporation gas heat exchanger based on a flow of evaporation gas collected along the evaporation gas collect line, and configured to primarily decompress evaporation gas compressed by the evaporation gas compressor; an evaporation gas expander configured to secondarily decompress evaporation gas primarily decompressed by the Joule-Thomson valve; and a gas-liquid separator configured to separate flash gas from evaporation gas decompressed by the Joule-Thomson valve. According to the present invention, the system for treating liquefied gas performs a first decompression of evaporation gas using the Joule-Thomson valve, and a second decompression thereof using the evaporation gas expander when liquefying the evaporation gas to sequentially perform an isenthalpic process and an isentropic process, thereby improving the efficiency of evaporation gas liquefaction, compared to perform the entire decompression process using the Joule-Thomson valve. In addition, rotational power generated by the evaporation gas expander driven by the introduction of evaporation gas may be used as power to the evaporation gas expander to reduce power, thereby the efficiency of the LNG treatment system.

82 citations


Network Information
Related Topics (5)
Heat transfer
181.7K papers, 2.9M citations
83% related
Combustion
172.3K papers, 1.9M citations
79% related
Reynolds number
68.4K papers, 1.6M citations
78% related
Laminar flow
56K papers, 1.2M citations
78% related
Control system
129K papers, 1.5M citations
76% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023895
20222,148
20211,236
20203,282
20194,240
20184,449