The aerodynamic characteristics directly affect driving characteristics, stability, operation, oil consumption, and safety of automobiles. The aerodynamic analyses of automobiles, such as the virtual wind tunnel experiment simulation, based on finite element methods have provided useful theoretical reference to automobile bodywork design. In this study, the air flow vector variation and distrib...

there are a number of ideas to generate cloud and precipitation in the southern coasts of caspian sea, but none of them explain the cause of precipitation particularly heavy and super heavy precipitations precisely. this study describes main thermodynamic factors when the situation and location of synoptic patterns are effective. on the basis of daily data, monthly regimes and monthly trends of...

In the field of aircraft design, interior illumination increasingly becomes an important design element. Different illumination scenarios inside an aircraft cabin are considered to influence the mood of air passengers, help passengers to be better prepared for time lags and to create an overall positive environment. Consequently, a physically correct and realistic lighting simulation becomes es...

The air distribution system is one of the key systems for ensuring safety and comfort passenger aircraft. large number components poses a severe challenge to efficiency, accuracy, convergence simulation. For 3D CFD method, complex meshes leads low computational efficiency. 1D simulation has high but local accuracy inadequate. To solve this problem, Fluid System Simulation Software Flomaster wit...

BACKGROUND Automobile exhaust contains precursors to ozone and fine particulate matter (PM ≤ 2.5 µm in aerodynamic diameter; PM2.5), posing health risks. Dependency on car commuting also reduces physical fitness opportunities. OBJECTIVE In this study we sought to quantify benefits from reducing automobile usage for short urban and suburban trips. METHODS We simulated census-tract level chan...

This article reviews the current knowledge about cosmic rays and their possible effects on health of air crew, discusses research directions necessary for establishing and measuring the risks, and highlights the need for physicians and air crew to be informed, despite the inconclusiveness of the evidence. A literature review of computerised medical and scientific databases was carried out. Rece...

original article   introduction: a practical solution which is sometimes efficient for noise control in the receiver locations is to enclose workers in an acoustic cabin. accordingly, prediction of the noise insulation performance is regarded as an important aspect of the design a personnel cabin. this study empirically aims to design an acoustic cabin using sandwich panels in a typical metal i...

Cabin air quality and thermal conditions have a direct impact on passenger flight crew’s health comfort. In this study, in-cabin environment particulate matter (PM) exposures were investigated in four China domestic flights. The mean standard deviation of the carbon dioxide (CO2) concentrations two tested flights are 1440 ± 111 ppm. measured maximum monoxide (CO) concentration is 1.2 ppm, which...