Numerical Study of Smoke Movement in Aircraft Cargo Compartment
Star-ccm+was used to establish a numerical computation model of smoke movement in an aircraft cargo compartment.The key parameters,such as cabin temperature and shading rate,were obtained to analyze the smoke movement patterns under different smoke generator mass fractions and positions which provide theoretical guidance for the development of airworthiness certification of aircraft cargo hold compartment smoke detection systems.The results show that the temperature and smoke detection re-sponse time do not change significantly when the smoke mass fraction is constant,but the growth rate of shading rate increases with the increase of smoke mass fraction.When the smoke generator is located at the cargo compartment wall,the smoke generator radial temperature decreases and then increases,and the temperature field shows an obvious ring shape.The wall temperature at the same radial distance is signifi-cantly higher than other locations.The shading rate growth rate increases in the area near the roof and de-creases in the area below the roof compared to when the smoke generator is in the center of the cargo compartment.The smoke diffuses horizontally in addition to vertically as it leaves the generating surface and before it reaches the roof,and the horizontal diffusion is more intense.
万方数据
维普
