@article{MTMT:34234013,
	title = {Parameter Identification of the Lagrangian-averaged Vorticity Deviation Vortex Detection Method Through the Investigation of Fluid Flow Around Solid Bodies},
	url = {https://m2.mtmt.hu/api/publication/34234013},
	author = {Kovács, Kinga Andrea and Balla, Esztella Éva},
	doi = {10.3311/PPme.22874},
	journal-iso = {PERIOD POLYTECH MECH ENG},
	journal = {PERIODICA POLYTECHNICA-MECHANICAL ENGINEERING},
	volume = {67},
	unique-id = {34234013},
	issn = {0324-6051},
	abstract = {The main focus of the current paper is the detection of vortices in fluid flow around a circular cylinder and a square cylinder, with an emphasis on the identification of the parameters used for vortex detection. The authors aim to enhance the practicality of an existing vortex detection method (Lagrangian-averaged vorticity deviation) by providing recommendations for the settings of the vortex detection parameters. The simulations were carried out using ANSYS Workbench 2022 R2, encompassing Reynolds numbers between 12 and 140, and angles of incidence from 0(degrees) to 45(degrees). The vortex detection was performed using MATLAB R2020b. The paper provides a comprehensive description of the parameters involved in the detection process and their significance, as well as the implementation of the parameter identification. The study results in the determination of the suggested parameter ranges, and a comparative analysis of different vortex detection methods is also presented for the case of the circular cylinder.},
	keywords = {parameter identification; aerodynamics; Circular cylinder; NUMERICAL-ANALYSIS; Vortex detection; bluff bodies},
	year = {2023},
	eissn = {1587-379X},
	pages = {293-302},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474}
}

@CONFERENCE{MTMT:34069785,
	title = {Aerodynamic and acoustic studies on a radial fan family developed for increased specific flow rate of dust-laden gases},
	url = {https://m2.mtmt.hu/api/publication/34069785},
	author = {Kocsis, Bálint and Benedek, Tamás and Ferenczy, Péter and Balla, Esztella Éva and Daku, Gábor and Vad, János},
	booktitle = {15th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics 2023, ETC 2023},
	doi = {10.29008/ETC2023-126},
	unique-id = {34069785},
	year = {2023},
	orcid-numbers = {Benedek, Tamás/0000-0001-8057-3156; Balla, Esztella Éva/0000-0001-6617-4474; Vad, János/0000-0001-5589-1603}
}

@CONFERENCE{MTMT:33814745,
	title = {Örvénydetektálás henger körüli áramlásban},
	url = {https://m2.mtmt.hu/api/publication/33814745},
	author = {Kovács, Kinga Andrea and Balla, Esztella Éva},
	booktitle = {OGÉT 2023},
	unique-id = {33814745},
	year = {2023},
	pages = {306-311},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474}
}

@article{MTMT:33687613,
	title = {Aeroacoustic investigation of airfoil profiles in turbulence at moderate Reynolds numbers involving the phased array microphone technique and the ANOVA statistical method},
	url = {https://m2.mtmt.hu/api/publication/33687613},
	author = {Lendvai, Bálint and Benedek, Tamás and Balla, Esztella Éva},
	doi = {10.1142/S0219477523500323},
	journal-iso = {FLUCT NOISE LETT},
	journal = {FLUCTUATION AND NOISE LETTERS},
	volume = {22},
	unique-id = {33687613},
	issn = {0219-4775},
	year = {2023},
	eissn = {1793-6780},
	orcid-numbers = {Lendvai, Bálint/0000-0003-3741-2001; Benedek, Tamás/0000-0001-8057-3156; Balla, Esztella Éva/0000-0001-6617-4474}
}

@inproceedings{MTMT:33202680,
	title = {Development of a radial flow fan family for contaminated gases of relatively high flow rate},
	url = {https://m2.mtmt.hu/api/publication/33202680},
	author = {Ferenczy, Péter and Balla, Esztella Éva and Benedek, Tamás and Daku, Gábor and Kocsis, Bálint and Kónya, Antal and Vad, János},
	booktitle = {Proceedings of Conference on Modelling Fluid Flow (CMFF'22)},
	unique-id = {33202680},
	year = {2022},
	pages = {262-272},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474; Benedek, Tamás/0000-0001-8057-3156; Vad, János/0000-0001-5589-1603}
}

@article{MTMT:33092669,
	title = {Models for Estimation of Lift and Drag Coefficients for Low-Reynolds-Number Cambered Plates},
	url = {https://m2.mtmt.hu/api/publication/33092669},
	author = {Balla, Esztella Éva and Vad, János},
	doi = {10.2514/1.J061579},
	journal-iso = {AIAA J},
	journal = {AIAA JOURNAL},
	volume = {60},
	unique-id = {33092669},
	issn = {0001-1452},
	abstract = {Empirical models capable of predicting the lift and drag coefficients of circular-arc cambered plate blades are presented, together with the detailed documentation of the related wind-tunnel technique and data evaluation. The blade profiles are equipped with rounded leading and trailing edges. The empirical models offer an easy-to-use tool for preliminary design of low-solidity low-speed blade cascades. By means of the models, the lift-coefficient range of 0-1.3 is covered, associated with the drag coefficient varying between 0.02 and 0.14. The validity ranges of the empirical models are as follows: Reynolds-number between 4x104 and 1.4x105, relative camber ranging from 0 to 8%, and angle of attack between 0 and 8 deg. The force coefficients are expressed as a function of relative camber, angle of attack, and Reynolds-number. The models assume linear relationships between the Reynolds-number and the force coefficients, as inspired by the literature and justified by statistical means. The dependence of the force coefficients on the angle of attack and the relative camber is expressed by incorporating second-order polynomials. The trends of force changes with Reynolds-number are analyzed. The cases of apparently extraordinary trends in the Reynolds-number dependence (i.e., increasing drag and decreasing lift with increasing Reynolds-number) are discussed in detail. A method for the determination of the confidence intervals related to the models is presented, and a detailed uncertainty analysis is provided. On this basis, the relative errors of the force coefficients can be quantified in a case-specific, empirical manner.},
	year = {2022},
	eissn = {1533-385X},
	pages = {6620-6632},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474; Vad, János/0000-0001-5589-1603}
}

@CONFERENCE{MTMT:32191653,
	title = {Refinement of a semi-empirical method for the estimation of profile vortex shedding frequency from low-speed axial fan blade sections},
	url = {https://m2.mtmt.hu/api/publication/32191653},
	author = {Balla, Esztella Éva and Vad, János},
	booktitle = {Proceedings of 14th European Conference on Turbomachinery Fluid dynamics & Thermodynamics ETC14},
	doi = {10.29008/ETC2021-591},
	unique-id = {32191653},
	year = {2021},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474; Vad, János/0000-0001-5589-1603}
}

@article{MTMT:31327590,
	title = {An empirical model to determine lift and drag coefficients of cambered plates at moderate Reynolds numbers},
	url = {https://m2.mtmt.hu/api/publication/31327590},
	author = {Balla, Esztella Éva and Vad, János},
	doi = {10.1177/0957650920915317},
	journal-iso = {P I MECH ENG A-J POW},
	journal = {PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY},
	volume = {235},
	unique-id = {31327590},
	issn = {0957-6509},
	year = {2021},
	eissn = {2041-2967},
	pages = {202-210},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474; Vad, János/0000-0001-5589-1603}
}

@mastersthesis{MTMT:31799366,
	title = {Aerodynamic and aeroacoustic behavior of axial fan blade sections at low Reynolds numbers},
	url = {https://m2.mtmt.hu/api/publication/31799366},
	author = {Balla, Esztella Éva},
	unique-id = {31799366},
	year = {2020},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474}
}

@CONFERENCE{MTMT:31393329,
	title = {A Laplacian filtering-based technique to localize vortex shedding noise in a strongly contaminated environment},
	url = {https://m2.mtmt.hu/api/publication/31393329},
	author = {Balla, Esztella Éva and Vad, János},
	booktitle = {8th Berlin Beamforming Conference (BeBeC)},
	unique-id = {31393329},
	year = {2020},
	orcid-numbers = {Balla, Esztella Éva/0000-0001-6617-4474; Vad, János/0000-0001-5589-1603}
}