An improved local correlation-based intermittency transition model appropriate for high-speed flow heat transfer

A symmetry-based length model for characterizing the hypersonic boundary layer transition on a slender cone at moderate incidence

“…Qin et al [29] have used an algebraic intermittency factor to accelerate the development of TBL in the late transition region, such that the overshoot phenomenon is reproduced with a reasonable degree of accuracy. However, Qin et al 's method is based on the perspective of transition model construction, and its applicability to complex configurations requires further investigations [13]. In the present approach, the transition overshoot is characterized by a single parameter, β l , which, if Fig.…”

“…Since nearly all transition models include a correlation equation to define the transition onset location [6,7], which is poorly predicted in general, the existing models usually give insufficient and even undetermined prediction accuracies [8,9]. Furthermore, HBLs are generally governed by different instability mechanisms on different surface areas [1,10,11], which results in enormous complexities in modeling and simulating HBL transitions [12,13]. The status calls for a reflection: whether one should always rely on a correct description of the transition mechanism for the foundation of a transition model, or perhaps might discover a universal principle governing transitional boundary layers, and work out a more efficient transition model.…”

A Symmetry-Based Length Model For Describing The Hypersonic Boundary Layer Transition On A Slender Cone At Moderate Incidence

“…Qin et al [27] have used an algebraic intermittency factor to accelerate the development of TBL in the late transition region, such that the overshoot phenomenon is reproduced with a reasonable degree of accuracy. However, Qin et al's method is based on the perspective of transition model construction, and its applicability to complex configurations requires further investigations [13]. In the present approach, the transition overshoot is characterized by a single parameter, l , which, if larger than unity, introduces a streamwise transition layer in between the laminar and full-turbulent flows.…”

“…Taking the HBL on an inclined straight cone as an example, the Mack second mode is widely considered to be the dominant instability mode on the windward surface, the cross-flow mode on the lateral side, and the streamwise vortex mode on the leeward center of the cone [9,10,11]. The varying transition mechanisms result in enormous and ever increasing complexities in modeling and simulating HBL transitions [12,13], which calls for a reflection: whether one should always rely on a correct description of the transition mechanism for the foundation of a transition model. One perhaps needs to discover a universal principle governing transitional boundary layers, and to work out a more efficient transitional model, rather than keeping proposing more and more complex version of the popular intermittency-factor-based transition models.…”

Investigation into The Influences of Turbulence Models on Heating Prediction of Hypersonic Inflatable Aerodynamic Decelerator

“…In contrast to EDU geometry, the parametric OML models were designed to provide data across a wide range of scalloping levels, which also provide a simplified and easily reproducible geometric representation of OML scalloping that can be used for further testing or for computational studies. In this paper, IRVE Scallop-10 model is selected as an example to carry out numerical simulation [5] in Figure 2(a). And the influence of different turbulence models on the accuracy calculation of its aerodynamic characteristics is analyzed.…”