Accurate and high-resolution boundary conditions and flow fields in the first-class cabin of an MD-82 commercial airliner
Accurate and high-resolution boundary conditions and flow fields in the first-class cabin of an MD-82 commercial airliner
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DOI：
10.1016/j.atmosenv.2012.03.039
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发表时间：
2012-09-01
影响因子：
5
通讯作者：
Chen, Qingyan
中科院分区：
文献类型：
--
作者：
Liu, Wei;Wen, Jizhou;Chen, Qingyan
商用客机客舱内的流场对于创造热舒适和健康的客舱环境至关重要。流场取决于扩散器处的热流体边界条件，以及座舱几何形状和布置。为了研究座舱内的流场，本文描述了一种获得座舱几何形状、扩压器处的边界条件和流场的方法。本研究使用激光跟踪系统和逆向工程生成MD-82飞机机舱的数字模型。尽管该系统的测量误差很小，但仍需要进行近似和假设，以减少工作量和数据量。几何模型也可以很容易地用于计算空间体积。热球风速计（HSA）和超声波风速计（UA）的组合，以获得速度的大小，速度方向，和湍流强度的扩散。测量结果表明，真实的舱室内的流动边界条件比较复杂，不同缝隙开口处的速度大小、方向和湍流强度变化很大。UA还被应用于测量20 Hz的三维空气速度，这也可以用来确定湍流强度。由于流动的不稳定性，至少应测量4 min，以获得准确的平均速度和湍流信息。结果表明，流场为低速、高湍流度流场。该研究为验证计算流体动力学（CFD）模型提供了高质量的数据，包括机舱几何形状，扩散器的边界条件，以及功能性MD-82商用客机头等舱内的高分辨率流场。(C)2012爱思唯尔有限公司保留所有权利。
Flow fields in commercial airliner cabins are crucial for creating a thermally comfortable and healthy cabin environment. Flow fields depend on the thermo-fluid boundary conditions at the diffusers, in addition to the cabin geometry and furnishing. To study the flow fields in cabins, this paper describes a procedure to obtain the cabin geometry, boundary conditions at the diffusers, and flow fields. This investigation used a laser tracking system and reverse engineering to generate a digital model of an MD-82 aircraft cabin. Even though the measuring error by the system was very small, approximations and assumptions were needed to reduce the workload and data size. The geometric model can also be easily used to calculate the space volume. A combination of hot-sphere anemometers (HSA) and ultrasonic anemometers (UA) were applied to obtain the velocity magnitude, velocity direction, and turbulence intensity at the diffusers. The measured results indicate that the flow boundary conditions in a real cabin were rather complex and the velocity magnitude, velocity direction, and turbulence intensity varied significantly from one slot opening to another. UAs were also applied to measure the three-dimensional air velocity at 20 Hz, which could also be used to determine the turbulence intensity. Due to the instability of the flow, it should at least be measured for 4 min to obtain accurate averaged velocity and turbulence information. It was found that the flow fields were of low speed and high turbulence intensity. This study provides high quality data for validating Computational Fluid Dynamics (CFD) models, including cabin geometry, boundary conditions of diffusers, and high-resolution flow field in the first-class cabin of a functional MD-82 commercial airliner. (C) 2012 Elsevier Ltd. All rights reserved.