TY - JOUR AU - Papp, Bálint AU - Istók, Balázs AU - Koren, Márton AU - Balczó, Márton AU - Kristóf, Gergely TI - Statistical assessment of the concentration fluctuations in street canyons via time-resolved wind tunnel experiments JF - JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS J2 - J WIND ENG IND AEROD VL - 246 PY - 2024 PG - 17 SN - 0167-6105 DO - 10.1016/j.jweia.2024.105665 UR - https://m2.mtmt.hu/api/publication/34742505 ID - 34742505 N1 - Export Date: 18 March 2024 Correspondence Address: Papp, B.; Department of Fluid Mechanics, Műegyetem rkp. 3, Hungary; email: papp.balint@gpk.bme.hu Funding details: European Commission, EC, VEKOP-2.3.3-15-2017-00017 Funding details: Gedeon Richter, PD 127919 Funding details: Richter Gedeon Talentum Alapítvány Funding details: Nemzeti Kutatási, Fejlesztési és Innovaciós Alap, NKFIA Funding details: Innovációs és Technológiai Minisztérium, ÚNKP-21-3-I-BME-252 Funding details: National Research, Development and Innovation Office, TKP-6-6 Funding text 1: The present study was funded by grant no. K 124439 from the National Research, Development, and Innovation Office, Hungary. Project no. TKP-6-6/PALY-2021 has been implemented with the support provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. Bálint Papp's contribution to this paper was supported by the ÚNKP-21-3 New National Excellence Program of the Ministry for Innovation and Technology (Grant No. ÚNKP-21-3-I-BME-252), as well as by the Gedeon Richter Talent Foundation (registered office: Gyömrői út 19–21, 1103 Budapest, Hungary), established by Gedeon Richter Plc. within the framework of the Gedeon Richter PhD Scholarship. Márton Balczó gratefully acknowledges the support of project PD 127919 of the National Research, Development, and Innovation (NRDI) Fund, entitled “Application and validation of measurement techniques related to the physical modeling of the atmospheric boundary layer in a new boundary layer wind tunnel”. The authors wish to acknowledge the support of the European Union and of the Hungarian Government in the project VEKOP-2.3.3-15-2017-00017 "Establishment of a Laboratory for Atmospheric Flows". Funding text 2: The present study was funded by grant no. K 124439 from the National Research, Development, and Innovation Office, Hungary . Project no. TKP-6-6/PALY-202 1 has been implemented with the support provided by the Ministry of Culture and Innovation of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021-NVA funding scheme. Bálint Papp's contribution to this paper was supported by the ÚNKP-21-3 New National Excellence Program of the Ministry for Innovation and Technology (Grant No. ÚNKP-21-3-I-BME-252 ), as well as by the Gedeon Richter Talent Foundation (registered office: Gyömrői út 19–21, 1103 Budapest, Hungary), established by Gedeon Richter Plc., within the framework of the Gedeon Richter PhD Scholarship. Márton Balczó gratefully acknowledges the support of project PD 127919 of the National Research, Development, and Innovation (NRDI) Fund , entitled “Application and validation of measurement techniques related to the physical modeling of the atmospheric boundary layer in a new boundary layer wind tunnel”. The authors wish to acknowledge the support of the European Union and of the Hungarian Government in the project VEKOP-2.3.3-15-2017-00017 "Establishment of a Laboratory for Atmospheric Flows". AB - Time-resolved wind tunnel experiments are performed for three periodic street canyon configurations: one of uniform (H/W = 1) and two of variable building height (consisting of 0.5H and 1.5H tall towers in aligned and staggered arrangements) for perpendicular wind direction. The velocity field is mapped using Laser Doppler Anemometry (LDA), and the tracer gas concentration is sampled using Fast Flame Ionization Detection (FFID). The concentration field is characterized by the mean concentration and the characteristic percentiles of the concentration-time series, such as the median and the peak, represented by the 99th percentile, in a total of 1138 sampling points. The probability distribution of the concentration in each point is modeled using the gamma distribution, which is fitted based on the mean and the variance of the measured time series. The results show that the mean pedestrian exposure to air pollutants is significantly lower in the case of heterogeneous roof height, although the mean concentration at the leeward corner of the source canyon can locally exceed those of the uniform street canyons for both tower arrangements of variable building height. Moreover, it is shown that the concentration peaks for both tower configurations can significantly exceed those of the uniform canyons case, especially near the sources. © 2024 The Authors LA - English DB - MTMT ER - TY - CHAP AU - Papp, Bálint AU - Istók, Balázs AU - Koren, Márton AU - Balczó, Márton AU - Kristóf, Gergely ED - Jurčáková, Klára ED - Kellnerová, Radka TI - Statistical assessment of the ventilation of street canyons based on time-resolved wind tunnel experiments T2 - PHYSMOD 2022 - International Workshop on Physical Modeling of Flow and Dispersion Phenomena PB - Ústav termomechaniky AV ČR CY - Prága SN - 9788087012819 PY - 2022 SP - 143 EP - 155 PG - 12 UR - https://m2.mtmt.hu/api/publication/33113557 ID - 33113557 LA - English DB - MTMT ER - TY - JOUR AU - Papp, Bálint AU - Kristóf, Gergely AU - Istók, Balázs AU - Koren, Márton AU - Balczó, Márton AU - Balogh, Miklós TI - Measurement-driven Large Eddy Simulation of dispersion in street canyons of variable building height JF - JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS J2 - J WIND ENG IND AEROD VL - 211 PY - 2021 PG - 16 SN - 0167-6105 DO - 10.1016/j.jweia.2020.104495 UR - https://m2.mtmt.hu/api/publication/31806292 ID - 31806292 LA - English DB - MTMT ER - TY - JOUR AU - Balczó, Márton AU - Tomor, András TI - Wind tunnel and computational fluid dynamics study of wind conditions in an urban square JF - IDŐJÁRÁS / QUARTERLY JOURNAL OF THE HUNGARIAN METEOROLOGICAL SERVICE J2 - IDŐJÁRÁS VL - 120 PY - 2016 IS - 2 SP - 199 EP - 229 PG - 31 SN - 0324-6329 UR - https://m2.mtmt.hu/api/publication/3121317 ID - 3121317 N1 - Funding Agency and Grant Number: Hungarian Scientific Research Fund [K108936]; New Szechenyi Plan project "Development of quality-oriented and harmonized R+D+I strategy and functional model at BME" [TAMOP-4.2.1/B-09/1/KMR-2010-0002] Funding text: The scientific work presented in this article was supported by the projects K108936 "Flow and dispersion phenomena in urban environment" of the Hungarian Scientific Research Fund and the New Szechenyi Plan project TAMOP-4.2.1/B-09/1/KMR-2010-0002 "Development of quality-oriented and harmonized R+D+I strategy and functional model at BME". AB - Recognizing the role of urban squares in city life, the paper focuses on wind conditions at squares, with the objective to understand the building-scale flow phenomena influencing the wind comfort of pedestrians and the dispersion of pollutants. Wind tunnel testing of a selected square has been carried out at two wind directions, as well as accompanying computational fluid dynamics (CFD) simulations were performed using the MISKAM microscale model. The high spatial resolution experimental and CFD data allowed the identification of flow structures, like separation bubbles, vortices, high-speed zones in and around the square. Based on the analysis of numerical and experimental data obtained, the MISKAM model is able to resolve the flow field in a complex urban setting with some limitations. In a second step, the model was then used to run further numerical simulations, to compare fully built-up areas to an area with a square, and to assess the influence of tree plantings on the square. Results regarding the latter indicate that below tree crown height, flow velocity and turbulent kinetic energy are both decreased by about one fourth due to the vegetation. It is also shown that the presence of the square increases wind speed in connecting streets and induces longitudinal flows even in streets perpendicular to the approaching wind direction. The time-resolved wind tunnel measurements also allowed presenting the local velocity statistics as wind roses. Using these, we identified locations with non-isotropic turbulence and alternating wind directions. LA - English DB - MTMT ER - TY - CHAP AU - Balczó, Márton AU - Lajos, Tamás ED - Bozó, László ED - Pappné Ferenczi, Zita ED - T., Puskás M TI - Investigation of ventilation and air quality of urban squares T2 - 17th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes PB - Hungarian Meteorological Service CY - Budapest SN - 9789639931107 PY - 2016 PG - 5 UR - https://m2.mtmt.hu/api/publication/3106143 ID - 3106143 LA - English DB - MTMT ER - TY - CHAP AU - Balczó, Márton ED - Kékesi, Tamás TI - Design issues of a new wind tunnel laboratory for environmental and vehicle aerodynamics T2 - The Publications of the MultiScience - XXX. microCAD International Multidisciplinary Scientific Conference PB - University of Miskolc CY - Miskolc SN - 9789633581131 PY - 2016 PG - 8 DO - 10.26649/musci.2016.094 UR - https://m2.mtmt.hu/api/publication/3055314 ID - 3055314 LA - English DB - MTMT ER - TY - THES AU - Balczó, Márton TI - Városi terek átszellőzésének és légszennyezettségének modellezése PB - Budapesti Műszaki és Gazdaságtudományi Egyetem PY - 2015 SP - 137 UR - https://m2.mtmt.hu/api/publication/2944304 ID - 2944304 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Balczó, Márton AU - Lajos, Tamás TI - Flow and Dispersion Phenomena in a Simplified Urban Square JF - PERIODICA POLYTECHNICA-CIVIL ENGINEERING J2 - PERIOD POLYTECH CIV ENG VL - 59 PY - 2015 IS - 3 SP - 347 EP - 360 PG - 14 SN - 0553-6626 DO - 10.3311/PPci.7852 UR - https://m2.mtmt.hu/api/publication/2895146 ID - 2895146 N1 - Funding Agency and Grant Number: Hungarian Scientific Research Fund [K 108936]; New Szechenyi Plan project [TAMOP-4.2.1/B-09/1/KMR-2010-0002] Funding text: The contributions of MSc students Peter Manninger and Mate Varga are gratefully acknowledged. The project presented in this article is supported by the projects K 108936 "Flow and dispersion phenomena in urban environment" of the Hungarian Scientific Research Fund and the New Szechenyi Plan project TAMOP-4.2.1/B-09/1/KMR-2010-0002 "Development of quality-oriented and harmonised R + D + I strategy and functional model at BME". LA - English DB - MTMT ER - TY - JOUR AU - Bottyán, Zsolt AU - Gyöngyösi, András Zénó AU - Wantuch, F AU - Tuba, Zoltán AU - Kurunczi, R AU - Kardos, P AU - Istenes, Zoltán AU - Weidinger, Tamás AU - Hadobács, K AU - Szabó, Z AU - Balczó, Márton AU - Varga, Árpád AU - Bíróné Kircsi, Andrea AU - Horváth, Gy TI - Measuring and Modeling of Hazardous Weather Phenomena to Aviation Using the Hungarian Unmanned Meteorological Aircraft System (HUMAS) JF - IDŐJÁRÁS / QUARTERLY JOURNAL OF THE HUNGARIAN METEOROLOGICAL SERVICE J2 - IDŐJÁRÁS VL - 119 PY - 2015 IS - 3 SP - 307 EP - 335 PG - 29 SN - 0324-6329 UR - https://m2.mtmt.hu/api/publication/2778891 ID - 2778891 N1 - Department of Military Aviation, National University of Public Service, P. O. Box. 1, Szolnok, H-5008, Hungary Department of Meteorology, Eötvös Loránd University, Pázmány Péter sétány 1/A, Budapest, H-1117, Hungary Aviation Authority, National Transport Authority, Lincoln u. 1, Vecsés, H-2220, Hungary Időkep Ltd, Bartók B. út 65/b, Budapest, H-1224, Hungary HungaroControl, Hungarian Air Navigation Plc, Iglo u. 33–35, Budapest, H-1185, Hungary Department of Software Technology and Methodology, Eötvös Loránd University, Pázmány Péter sétány 1/C, Budapest, H-1117, Hungary Geoinformation Service, Hungarian Defence Forces, Budapest, H-1524, Hungary Department of Fluid Mechanics, Budapest University of Technology and Economics, Budafoki út 8, Budapest, H-1111, Hungary Department of Meteorology, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary Hungarian Meteorological Service, Gilice tér 39, Budapest, 1181, Hungary Cited By :4 Export Date: 14 February 2023 Correspondence Address: Bottyán, Z.; Department of Military Aviation, P. O. Box. 1, Hungary; email: bottyan.zsolt@uni-nke.hu LA - English DB - MTMT ER - TY - CONF AU - Trini, Castelli S. AU - Leitl, B. AU - Baumann-Stanzer, K. AU - Reisin, T.G. AU - Armand, P. AU - Barmpas, F. AU - Balczó, Márton AU - Andronopoulos, S. AU - Jurcakova, K. ED - Batchvarova, Ekaterina ED - Kirova, Hristina ED - Hristova, Elena TI - Updates on cost action ES1006. Evaluation, improvement and guidance for the use of local-scale emergency prediction and response tools for airborne hazards in built environments T2 - Proceedings of the 16th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes PB - Bulgarian Academy of Sciences (BAS) C1 - Varna PY - 2014 PG - 5 UR - https://m2.mtmt.hu/api/publication/31969198 ID - 31969198 AB - Updates on the results from COST Action ES1006 activity are presented and discussed. The main focus of the ES1006 Action is the evaluation of the airborne pollutant dispersion models, when applied for accidental or intentional releases in complex built environments, urban or industrial. The main achieved outcomes are introduced and briefly illustrated. More detailed and focused presentations go along with this general one, in order to discuss the most scientific and applicative results of the ES1006 COST Action LA - English DB - MTMT ER -