潜熱蓄熱壁をもつ円管内振動流における軸方向熱輸送

抄録

This study investigated the effect of latent heat storage wall on axial heat transportation in oscillatory flow by numerical simulation. To clarify an effect of the oscillation frequency, nondimensional frequency (Womersley number) was changed 0.78 ~ 3.13. The stroke of oscillation is 45 mm (Peak-to-Peak). The tube was inner diameter of 6 mm, wall thickness 1 mm, and tube length 250 mm. The difference of temperature of tube both ends 30 K, and the wall materials made composite heat storage material (CompositePCM). As a result, the effective heat transportation coefficient showed up to 3.13 times in comparison with the acrylic tube, and the magnification increased with decreasing frequency.