Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan

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MARTINAITIS, Vytautas ;RIMDŽIUS, Dovydas ;BIELSKUS, Juozas ;STRECKIENĖ, Giedrė ;MOTUZIENĖ, Violeta .
Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 66, n.5, p. 325-336, may 2020. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/preliminary-comparison-of-the-performance-thermodynamic-models-of-the-subsonic-ejector-and-turbofan/>. Date accessed: 24 sep. 2020. 
doi:http://dx.doi.org/10.5545/sv-jme.2019.6379.
Martinaitis, V., Rimdžius, D., Bielskus, J., Streckienė, G., & Motuzienė, V.
(2020).
Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan.
Strojniški vestnik - Journal of Mechanical Engineering, 66(5), 325-336.
doi:http://dx.doi.org/10.5545/sv-jme.2019.6379
@article{sv-jmesv-jme.2019.6379,
	author = {Vytautas  Martinaitis and Dovydas  Rimdžius and Juozas  Bielskus and Giedrė  Streckienė and Violeta  Motuzienė},
	title = {Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {66},
	number = {5},
	year = {2020},
	keywords = {ejector; turbofan; thermodynamic model; flow mixing; efficiency of compression; entrainment ratio},
	abstract = {Flow-mixing is common in technological processes and both ejectors and turbofans are able to realize the interaction between flows with different energy potentials. Ejectors have been extensively used and their analytical models have been widely presented. Meanwhile to the best of authors’ knowledge there is a lack of studies exploring efficiencies of turbofans. The goal of this paper is to compare thermodynamic processes in these devices. Their efficiencies are compared in terms of compression and entrainment ratios. A comprehensive one-dimensional subsonic thermodynamic models of the ejector and turbofan are presented. The quantitative indices are obtained for the same initial conditions expressed as the ratio of differences in enthalpies for ideal compression and ideal expansion. When initial conditions are equal to the numeric value of the combination of isentropic efficiency of evaluated components (numerical case 0.16), both devices have the same efficiencies; at lower initial conditions (numerical case 0.10), turbofan’s entrainment ratio is 1.5 times and compression efficiency 1.25 times higher; at higher value of initial conditions (numerical case 0.28) – the ejector is more efficient. Such distinctive characteristics of turbofans and the nature of their variation may correspond to the specific application areas of the technological equipment, which require certain flow mixing parameters.},
	issn = {0039-2480},	pages = {325-336},	doi = {10.5545/sv-jme.2019.6379},
	url = {https://www.sv-jme.eu/article/preliminary-comparison-of-the-performance-thermodynamic-models-of-the-subsonic-ejector-and-turbofan/}
}
Martinaitis, V.,Rimdžius, D.,Bielskus, J.,Streckienė, G.,Motuzienė, V.
2020 May 66. Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 66:5
%A Martinaitis, Vytautas 
%A Rimdžius, Dovydas 
%A Bielskus, Juozas 
%A Streckienė, Giedrė 
%A Motuzienė, Violeta 
%D 2020
%T Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan
%B 2020
%9 ejector; turbofan; thermodynamic model; flow mixing; efficiency of compression; entrainment ratio
%! Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan
%K ejector; turbofan; thermodynamic model; flow mixing; efficiency of compression; entrainment ratio
%X Flow-mixing is common in technological processes and both ejectors and turbofans are able to realize the interaction between flows with different energy potentials. Ejectors have been extensively used and their analytical models have been widely presented. Meanwhile to the best of authors’ knowledge there is a lack of studies exploring efficiencies of turbofans. The goal of this paper is to compare thermodynamic processes in these devices. Their efficiencies are compared in terms of compression and entrainment ratios. A comprehensive one-dimensional subsonic thermodynamic models of the ejector and turbofan are presented. The quantitative indices are obtained for the same initial conditions expressed as the ratio of differences in enthalpies for ideal compression and ideal expansion. When initial conditions are equal to the numeric value of the combination of isentropic efficiency of evaluated components (numerical case 0.16), both devices have the same efficiencies; at lower initial conditions (numerical case 0.10), turbofan’s entrainment ratio is 1.5 times and compression efficiency 1.25 times higher; at higher value of initial conditions (numerical case 0.28) – the ejector is more efficient. Such distinctive characteristics of turbofans and the nature of their variation may correspond to the specific application areas of the technological equipment, which require certain flow mixing parameters.
%U https://www.sv-jme.eu/article/preliminary-comparison-of-the-performance-thermodynamic-models-of-the-subsonic-ejector-and-turbofan/
%0 Journal Article
%R 10.5545/sv-jme.2019.6379
%& 325
%P 12
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 66
%N 5
%@ 0039-2480
%8 2020-05-26
%7 2020-05-26
Martinaitis, Vytautas, Dovydas  Rimdžius, Juozas  Bielskus, Giedrė  Streckienė, & Violeta  Motuzienė.
"Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan." Strojniški vestnik - Journal of Mechanical Engineering [Online], 66.5 (2020): 325-336. Web.  24 Sep. 2020
TY  - JOUR
AU  - Martinaitis, Vytautas 
AU  - Rimdžius, Dovydas 
AU  - Bielskus, Juozas 
AU  - Streckienė, Giedrė 
AU  - Motuzienė, Violeta 
PY  - 2020
TI  - Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2019.6379
KW  - ejector; turbofan; thermodynamic model; flow mixing; efficiency of compression; entrainment ratio
N2  - Flow-mixing is common in technological processes and both ejectors and turbofans are able to realize the interaction between flows with different energy potentials. Ejectors have been extensively used and their analytical models have been widely presented. Meanwhile to the best of authors’ knowledge there is a lack of studies exploring efficiencies of turbofans. The goal of this paper is to compare thermodynamic processes in these devices. Their efficiencies are compared in terms of compression and entrainment ratios. A comprehensive one-dimensional subsonic thermodynamic models of the ejector and turbofan are presented. The quantitative indices are obtained for the same initial conditions expressed as the ratio of differences in enthalpies for ideal compression and ideal expansion. When initial conditions are equal to the numeric value of the combination of isentropic efficiency of evaluated components (numerical case 0.16), both devices have the same efficiencies; at lower initial conditions (numerical case 0.10), turbofan’s entrainment ratio is 1.5 times and compression efficiency 1.25 times higher; at higher value of initial conditions (numerical case 0.28) – the ejector is more efficient. Such distinctive characteristics of turbofans and the nature of their variation may correspond to the specific application areas of the technological equipment, which require certain flow mixing parameters.
UR  - https://www.sv-jme.eu/article/preliminary-comparison-of-the-performance-thermodynamic-models-of-the-subsonic-ejector-and-turbofan/
@article{{sv-jme}{sv-jme.2019.6379},
	author = {Martinaitis, V., Rimdžius, D., Bielskus, J., Streckienė, G., Motuzienė, V.},
	title = {Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {66},
	number = {5},
	year = {2020},
	doi = {10.5545/sv-jme.2019.6379},
	url = {https://www.sv-jme.eu/article/preliminary-comparison-of-the-performance-thermodynamic-models-of-the-subsonic-ejector-and-turbofan/}
}
TY  - JOUR
AU  - Martinaitis, Vytautas 
AU  - Rimdžius, Dovydas 
AU  - Bielskus, Juozas 
AU  - Streckienė, Giedrė 
AU  - Motuzienė, Violeta 
PY  - 2020/05/26
TI  - Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 66, No 5 (2020): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2019.6379
KW  - ejector, turbofan, thermodynamic model, flow mixing, efficiency of compression, entrainment ratio
N2  - Flow-mixing is common in technological processes and both ejectors and turbofans are able to realize the interaction between flows with different energy potentials. Ejectors have been extensively used and their analytical models have been widely presented. Meanwhile to the best of authors’ knowledge there is a lack of studies exploring efficiencies of turbofans. The goal of this paper is to compare thermodynamic processes in these devices. Their efficiencies are compared in terms of compression and entrainment ratios. A comprehensive one-dimensional subsonic thermodynamic models of the ejector and turbofan are presented. The quantitative indices are obtained for the same initial conditions expressed as the ratio of differences in enthalpies for ideal compression and ideal expansion. When initial conditions are equal to the numeric value of the combination of isentropic efficiency of evaluated components (numerical case 0.16), both devices have the same efficiencies; at lower initial conditions (numerical case 0.10), turbofan’s entrainment ratio is 1.5 times and compression efficiency 1.25 times higher; at higher value of initial conditions (numerical case 0.28) – the ejector is more efficient. Such distinctive characteristics of turbofans and the nature of their variation may correspond to the specific application areas of the technological equipment, which require certain flow mixing parameters.
UR  - https://www.sv-jme.eu/article/preliminary-comparison-of-the-performance-thermodynamic-models-of-the-subsonic-ejector-and-turbofan/
Martinaitis, Vytautas, Rimdžius, Dovydas, Bielskus, Juozas, Streckienė, Giedrė, AND Motuzienė, Violeta.
"Preliminary Comparison of the Performance Thermodynamic Models of the Subsonic Ejector and Turbofan" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 66 Number 5 (26 May 2020)

Authors

Affiliations

  • Vilnius Gediminas Technical Universit 1
  • Vilnius Gediminas Technical University 2

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 66(2020)5, 325-336

https://doi.org/10.5545/sv-jme.2019.6379

Flow-mixing is common in technological processes and both ejectors and turbofans are able to realize the interaction between flows with different energy potentials. Ejectors have been extensively used and their analytical models have been widely presented. Meanwhile to the best of authors’ knowledge there is a lack of studies exploring efficiencies of turbofans. The goal of this paper is to compare thermodynamic processes in these devices. Their efficiencies are compared in terms of compression and entrainment ratios. A comprehensive one-dimensional subsonic thermodynamic models of the ejector and turbofan are presented. The quantitative indices are obtained for the same initial conditions expressed as the ratio of differences in enthalpies for ideal compression and ideal expansion. When initial conditions are equal to the numeric value of the combination of isentropic efficiency of evaluated components (numerical case 0.16), both devices have the same efficiencies; at lower initial conditions (numerical case 0.10), turbofan’s entrainment ratio is 1.5 times and compression efficiency 1.25 times higher; at higher value of initial conditions (numerical case 0.28) – the ejector is more efficient. Such distinctive characteristics of turbofans and the nature of their variation may correspond to the specific application areas of the technological equipment, which require certain flow mixing parameters.

ejector; turbofan; thermodynamic model; flow mixing; efficiency of compression; entrainment ratio