Wyniki wyszukiwania - BazTech

1

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

EN

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%.

2

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

EN

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%.

3

Quality management tools in public transport

Luskova M.

TTS Technika Transportu Szynowego

|

2012

|

R. 19, nr 9

1163--1168, CD

EN

Public transport sector play a very important role for the prosperity of the whole European Union. The inhabitants’ demands for the public transport can be met only by acceptance of such quality principles and practices that offer the customer services satisfying or exceeding their expectations. The public transport quality enhancing is more and more connected with competitiveness that is necessary to be increased towards constantly expanding automobile transport. The paper presents some known quality management tools that enable better understanding the quality conception in public transport and processes of continued improving. The effort of the organization should concentrate on the fact that the quality perceived by the customer is approaching as much as possible the quality expected by him.

4

The analysis in solving the problems of forecasting of the conditions of consumer goods transportations

Nefedov N., Kovtsur K.

Transport Problems

|

2010

|

T. 5, z. 3

27-31

EN

There were determined parameters which will allow to develop the precise forecast of consumer goods transportations conditions and by means of which will be possible to decrease of transportations costs. This problem was solved by cluster analysis.

PL

Istnieją wskaźniki, które pozwalają na dokładne prognozowanie warunków transportu dóbr konsumpcyjnych, dzięki którym możliwe będzie obniżenie kosztów transportu. Problem ten został rozwiązany poprzez analizę klastrową.