Efficient Thermo-Chemistry Tabulation for Non-Premixed Combustion at High-Pressure Conditions
Efficient Thermo-Chemistry Tabulation for Non-Premixed Combustion at High-Pressure Conditions
复制标题
高压条件下非预混燃烧的高效热化学表格
DOI：
10.1007/s10494-018-9932-4
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Pfitzner M.
中科院分区：
文献类型：
--
作者：
Zips J;Müller H.;Pfitzner M.
在高压发动机中，推进剂喷射和湍流燃烧常常受真实气体效应的影响。然而，以前的研究表明，流体性质从理想气体行为的偏离对层流火焰结构的影响是有限的。这是由于化学反应发生在温度足够高且分子相互作用可忽略的火焰区，即，理想气体假设是有效的。另一方面，高压条件下喷射过程的各种实验和数值研究表明，真实气体效应对湍流流动有很大的影响。流体性质的快速变化会影响混合。在这项工作中，我们利用差距的保真度的热力学模型所需的描述层流火焰结构和所需的描述湍流场。然后，我们提出了一个新的真实气体火焰模型，提高了数值性能。新配方的计算成本并不显着高于理想气体模拟。该方法的性能进行了分析，我们的假设所引入的误差进行评估比较更完整的建模。最后，该方法被用来模拟湍流射流火焰从同轴喷射器在超临界压力和低温氧化剂温度。结果与实验OH的图像提供证据，本方法的适用性进行了比较。
Propellant injection and turbulent combustion in high-pressure engines is often dominated by real-gas effects. However, previous studies suggested that the departure of the fluid properties from an ideal gas behavior has only a limited effect on the laminar flame structure. This is due to the fact that chemical reactions take place in the flame zone where the temperature is sufficiently high and molecular interactions are negligible, i.e., the ideal gas assumption is valid. On the other hand, various experimental and numerical studies of injection processes at high-pressure conditions demonstrated that real-gas effects can have a strong impact on the turbulent flow. Mixing is influenced by the rapid change of fluid properties. In this work, we exploit the gap in the fidelity of the thermodynamics model needed to describe the laminar flame structure and that needed to describe the turbulent flow field. We then propose a new real-gas flamelet model with increased numerical performance. The computational cost of the new formulation is not significantly higher than that of an ideal gas simulation. The performance of the method is analyzed and the error that is introduced by our assumptions is assessed by comparison to more complete modeling. Finally, the method is used to simulate a turbulent jet flame emanating from a coaxial injector at supercritical pressure and cryogenic oxidizer temperature. The results are compared with experimental OH∗images giving evidence of the suitability of the present method.
登录
查看更多内容
影响因子：
3.9
作者：
G. Ribert;X. Petit;P. Domingo
通讯作者：
P. Domingo
火箭应用超临界混合和燃烧的大涡模拟
DOI：
--
发表时间：
2014
期刊：
影响因子：
--
作者：
Jean;M. Ihme
通讯作者：
M. Ihme
DOI：
10.1016/j.proci.2010.07.036
发表时间：
2011
期刊：
--
影响因子：
--
作者：
T. Schmitt;Yoann Méry;M. Boileau;S. Candel
通讯作者：
T. Schmitt;Yoann Méry;M. Boileau;S. Candel
压力对真实气体层流逆流的影响
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
A. J. Juanós;W. Sirignano
通讯作者：
W. Sirignano
影响因子：
3.4
作者：
Hakim, L.;Ruiz, A.;Candel, S.
通讯作者：
Candel, S.