Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Powiadomienia systemowe

Sesja wygasła!
Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: inżynieria samochodowa

Sortuj według:

Ogranicz wyniki do:

Optimization of the electric bus radiator design in terms of noise emissions and energy consumption by computational fluid dynamics

Janicka Anna, Zawiślak Maciej, Głogoza Artur, Włostowski Radoslaw

Combustion Engines

2022

R. 61, nr 4

41--50

The paper presents the numerical optimization of an innovative radiator for use in electric buses in terms of energy consumption and noise emission. Computational fluid dynamics simulations were performed. The flow of the cooling medium was modeled using the RANS method. The two-equation k-ɛ turbulence model, the heat transfer model and the acoustic model were used. According to the research results, the separation of the air stream in individual fan sections contributes to the improvement of energy efficiency and reduces noise emissions. As a result of the simulation, it was found that the best solution in terms of noise emission as well as the occurring flow phenomena caused about a 2 dB decrease of maximum values of the noise level and allowed the equalization of the cooling medium velocity (prevailing velocity range between 4 and 9 m/s). The results of the simulations were verified under laboratory and field conditions, showing a very good convergence of the model with the results of the experiments (i.e. the maximum noise level was estimated at 57 dB, under measurement conditions for the same operating point at 59 dB) while maintaining the baseline energy demand, which indicates a new approach in the method of shaping internal elements of electric vehicle coolers.

Kryteria projektowania alternatorów samochodowych

Sęk A., Bogusz R.

Przegląd Elektrotechniczny

2011

R. 87, nr 3

243-248

W artykule przedstawiamy podstawowe kryteria projektowania alternatorów samochodowych oraz szczególne rozwiązania pozwalające na optymalizację konstrukcji w kierunku ich realizacji. Rozważane są: obliczenia własnego modelu, redukcja rozmiarów i masy, modyfikacja obwodu magnetycznego wzbudzenia (zmiana rozmiaru szczeliny powietrznej), poprawa efektywności chłodzenia, zmniejszenie anego hałasu i inne.

In this paper, we present basic criteria, as well as special solutions, permitting on optimalization of construction in direction their realization designing automotive altemators. Own model calculations, reduction in mass and size, modifications in the magnetic excitation circuit (air gap size change), improvement in the cooling efficiency, decrease of the generating noise and others are discussed.