Temat: noise exhaust - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Aviation : environmental threats
Autorzy:: Balicki, Wł.
Głowacki, P.
Szczeciński, S.
Chachurski, R.
Powiązania:: https://bibliotekanauki.pl/articles/244965.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turbine engine
exhaust gases
pollutant, ecology
environment
engine noise
Opis:: Based on the available information and authors self-assessments, this article presents turbine engine exhaust gases effect on the environment, especially near to the aircraft and helicopters during their engines idle setting and take-offs. The concentration level of pollutants in gas turbine exhaust and its relation to the temperature and time of the combustion process is discussed. The article presents diffusion of the aircraft turbine engine exhaust in the airport area, focusing on aircraft take-off manoeuvre. The authors would like to draw attention of the aviation professionals to the fact that amount of exhaust from the turbine engine is so significant that may adversely change the ambient air near to the aircraft. Consequently, smaller amount of oxygen with increased level of carbon monoxide during engine start –up and idle can be a threat to the maintenance staff health. Also high emission level of the nitrogen oxides, especially during take-off and climb is indifferent for the environment. The paper gives an example of real fuel consumption and toxic gases emissions in the so-called landing and takeoff cycle (LTO) and during long-range flight. Turbine engines noise distribution and its intensity because of complex aerodynamic and thermodynamic processes is presented.
Źródło:: Journal of KONES; 2014, 21, 1; 7-14
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Selected aspects of modeling mufflers for exhaust systems of vehicles
Autorzy:: Gągorowski, A.
Melon, A.
Powiązania:: https://bibliotekanauki.pl/articles/245148.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: vehicles
noise reduction
exhaust system
mufflers
efficiency of attenuation
Opis:: The world used several solutions exhaust systems of motor vehicles. Today, in addition to the core function of which is to discharge exhaust gases from a combustion engine and noise reduction, these systems must comply with the functions associated with aftertreatment and impact on the characteristics of the engine. Requirements increase for noise suppression, at the tendency to increase engine efficiency and reduce fuel consumption. On the other hand, it seeks to reduce production costs. All this forces the search for new solutions and improve existing ones. In the process of the combustion gases discharge it is also important to eliminate frequency bands especially harmful to people and the environment (including other living organisms). Our goal is to develop a new design muffler of exhaust system that will meet these expectations of producers and users of vehicles. For this purpose, mathematical analysis of a classical systems with circular holes in the perforated pipes and proposed by the authors of the longitudinal gaps systems was performed. The paper presents some aspects of mufflers modeling for reducing acoustic noise emitted from the vehicle. Basic criterion for assessing was therefore the damping effect. Built theoretical models have allowed a rough estimate of acoustic performance at specific frequency bands by determining the transfer impedances. Because the noise reduction in automobiles is a complex, for the construction of such systems one of the important elements is to eliminate these frequency bands of acoustic waves in the process of the exhaust gases discharge which are the most dangerous to humans. The comparative analysis of these systems has allowed to determine the direction of further structural changes.
Źródło:: Journal of KONES; 2013, 20, 2; 97-103
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Exhaust emission measurements in the development of sustainable road transport
Autorzy:: Merkisz, J.
Merkisz-Guranowska, A.
Pielecha, J.
Nowak, M.
Jacyna, M.
Lewczuk, K.
Żak, J.
Powiązania:: https://bibliotekanauki.pl/articles/244259.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: exhaust emission
noise emission
real road conditions
sustainable transport
health protection
Opis:: Economic development of nations leads to a higher living comfort of the society. Rich societies want to move safely and independently and demand immediate availability of purchased goods or – in the case of Internet shopping – delivery in the shortest possible time. Such an approach facilitates a continuous growth in the number of road vehicles. At the current level of technology advancement, an increasing number of vehicles results in a growth of the consumption of fossil fuels, which entails increased exhaust emissions and that, in turn, has a negative impact on the health of the living organisms. Another negative consequence of an increased number of vehicles (increased road congestion) is the emission of noise. This problem is particularly significant in large agglomerations where people are surrounded by moving vehicles. This paper presents the extent of influence of the automotive industry on the natural environment and the extent of changes in vehicle design and organization of road infrastructure that were instituted to reduce the transport’s environmental burden. The further part of the paper presents a definition of the development of sustainable transport, its advantages and hurdles that we may encounter when modernizing a transport system. Subsequently in the paper, the measurements under actual vehicle operating conditions were described together with the possibilities of analysis of the research results and the advantages resulting from such an approach during the assessment of the impact of the automotive industry on the natural environment.
Źródło:: Journal of KONES; 2013, 20, 4; 277-284
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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