Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 3

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: pollution concentration

Sortuj według:

Ogranicz wyniki do:

Computing model for simulation of the pollution dispersion near the road with solid barriers

Biliaiev Mykola, Pshinko Oleksandr, Rusakova Tetiana, Biliaieva Viktoriia, Sładkowski Aleksander

Transport Problems

2021

T. 16, z. 2

73--86

In this study, a numerical model is proposed for calculating pollution zones near the road, taking into account the geometry of the automobile transport meteorological conditions, the location of the barriers and their height, and the chemical transformation of nitrogen oxides in the atmospheric air. The numerical solution is based on the integration of the mass transfer equations using the finite-difference method. To determine the components of the air flow velocity vector, a two-dimensional model of the potential flow is used, where the Laplace equation for the velocity potential is the modeling equation. Based on this numerical model, a software package has been developed that allows computational experiments and does not require large expenditures of computer time. Based on the results obtained, an assessment was made of the effectiveness of the use of barriers to reduce the level of air pollution near highways. It has been established that the use of barriers of different heights reduces the level of pollution behind the road by approximately 20-50%.

Application of local exhaust systems to reduce pollution concentration near the road

Biliaiev Mykola, Pshinko Oleksandr, Rusakova Tetiana, Biliaieva Viktoriia, Sładkowski Aleksander

Transport Problems

2020

T. 15, z. 4, cz. 1

137--148

In this study, the methodological foundations of the technology for the local reduction of chemical pollution from vehicles were improved through the use of twolevel suction units and guide plates of various lengths installed on the nozzles of the suction devices. A program has been developed for the numerical calculation of the carbon monoxide concentration field for evaluating the efficiency of using two-level exhaust systems with different lengths of guide plates on the gas flow selection pipes. The solution of the equations of hydrodynamics and mass transfer is carried out on the basis of finite-difference methods. A number of physical and computational experiments have been carried out; it has been established that the concentration of carbon monoxide in the zone of two-level suctions location decreases by 46-68%.

Odprowadzenie wód deszczowych w przypadku braku naturalnych odbiorników powierzchniowych

Kożuch J., Dróżdż A., Lichosyt K., Adamczyk K., Jelonek W.

Zeszyty Naukowo-Techniczne Stowarzyszenia Inżynierów i Techników Komunikacji w Krakowie. Seria: Materiały Konferencyjne

2008

Nr 85, z. 141

101-123

Celem niniejszego artykułu jest przedstawienie problemów, które wystąpiły przy opracowaniu projektu "Przebudowa drogi krajowej nr 94 od km około 305+070 do km 313+030 na odcinku Zederman - Jerzmanowice. W artykule omówiono główne zagadnienia wynikające z obowiązujących aktualnie przepisów w nawiązaniu do istniejącej sytuacji terenowej, budowy hydrogeologicznej omawianego terenu, jak również problemów wynikających z uwarunkowań społecznych.

The aim of the paper is presentation of problems that occurred while works under the project "Reconstruction of the national road No 94 from about 305+070 km to 313+030 km - section Zederman - Jerzmanowice". The basic problems concerning regulations being in force and with reference to existing area situation, hydrogeology construction and social conditions have been presented in the paper.