Study of Heat Transfer Correlations for Supercritical Hydrogen in Regenerative Cooling Channels
Study of Heat Transfer Correlations for Supercritical Hydrogen in Regenerative Cooling Channels
复制标题
DOI：
10.2514/1.22496
复制
发表时间：
2008
影响因子：
1.9
通讯作者：
J. M. Locke;D. Landrum
中科院分区：
文献类型：
--
作者：
J. M. Locke;D. Landrum
了解超临界氢的冷却效率对于开发用于再生冷却液氧/液氢火箭发动机的高压推力室至关重要。将可用的努塞尔数相关性与局部传热系数的广泛数据集进行比较，以确定每个相关性的有效范围。该数据集是根据之前的超临界氢加热直管实验编制的。结果表明，对于某些流体特性范围，特定相关性的表现优于其他相关性，传热系数预测的准确度范围为 23% 到 100% 以上。还评估了由于超临界氢的状态方程和输运性质的固有不确定性而导致的相关不确定性。发现性质相关的不确定性范围为 2% 至 10%，因此并不是相关预测中较大误差的主要贡献者。许多已发表的非氢超临界流体的相关性显示出可实现与氢相当的性能。
Understanding the cooling efficiency of supercritical hydrogen is crucial to the development of high-pressure thrust chambers forregeneratively cooledliquid-oxygen/liquid-hydrogen rocket engines. Available Nusselt number correlations are compared with an extensive data set of local heat transfer coefficients to determine the domains of validity for each correlation. The data set was compiled from previous heated straight-tube experiments with supercritical hydrogen. Results indicate that particular correlations perform better than others for certain regimes of fluid properties, with the accuracy of heat transfer coefficient predictions ranging from 23 to over 100%. Correlation uncertainty due to inherent uncertainties in the equation-of-state and transport properties of supercriticalhydrogenisalsoevaluated.Thepropertydependentuncertaintywasfoundtorangefrom2to10%,and therefore is not the main contributor to the larger errors in the correlation predictions. A number of published correlations for nonhydrogen supercritical fluids are shown to achieve comparable performance with hydrogen.