酸水素混合系の音速に対する古典的混合則の精度検証  [in Japanese] Accuracy validation of classical mixing rule for sound speed of oxygen-hydrogen mixture system  [in Japanese]

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Abstract

<p>In the computational fluid dynamics (CFD) analyses for the combustion chamber of typical liquid rocket engine, for the prediction of thermophysical properties of mixture system, classical mixing rule (CMR) is applied to cubic equation of state (EOS) for single-component. However, the validation of CMR has been hardly conducted because of few experimental data. Therefore, we have conducted the validation of CMR coupled with the Soave–Redlich–Kwong (SRK) EOS as one of the cubic EOSs for the sound speed of oxygen-hydrogen mixture system in supercritical state using molecular dynamics (MD) simulation with the NVEPG ensemble. We have validated the accuracy of CMR through the comparison of the sound speed obtained by MD simulations with that obtained by CMR coupled with the SRK EOS. As a result, we confirmed that the sound speed obtained from SRK EOS coupled with CMR corresponded with that obtained from MD simulations. Further, the relative difference in sound speed between the MD simulations and SRK EOS hardly increased against single-component fluids. This result indicates that the CMR can be applied for the sound speed of oxygen–hydrogen mixture system in supercritical condition.</p>

Journal

  • The Proceedings of Mechanical Engineering Congress, Japan

    The Proceedings of Mechanical Engineering Congress, Japan 2018(0), J0530401, 2018

    The Japan Society of Mechanical Engineers

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