Experimental study on the flow and heat transfer mechanism of the pre-cooler in the hypersonic aeroengine

Fu, Chao; Zou, Zhengping; Liu, Huoxing; Wang, Yifan; He, Xiaojuan

doi:10.2514/6.2017-2417

Cited by 5 publications

(13 citation statements)

References 21 publications

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“…However, the area in the immediate vicinity of the cylinder remains unclear (approximately x/D to 1.2). According to [23], the stream velocity is also negative in this part, while all numerical simulations show positive ux values. In [7], the results for Re = 4 × 10 3 are presented up to the distance x/D = 1.5 and the values in the immediate vicinity of the cylinder are not presented here.…”

Section: Normalized Mean Stream Velocity In the Subcritical Regionmentioning

confidence: 80%

“…Figure 7. Normalized mean stream velocity for selected Re; CFD and experimental data (Frohlich [22], Beudan [21], Khashehchi [7], Chao Fu [23], Cantwell [18]), subcritical and critical regimes.…”

Section: Flow Field Characteristicsmentioning

confidence: 99%

“…Experimental data for smooth cylinders in the subcritical region are taken from [21] and [22] for Re = 3.9 × 10 3 and from the newer [7] for Re = 4 × 10 3 or [23] for Re = 5 × 10 3 . Figure 7 shows CFD data for Re numbers close to the experiments.…”

Section: Normalized Mean Stream Velocity In the Subcritical Regionmentioning

confidence: 99%

“…Another fundamental quantity used in civil engineering is the pressure coefficient cp, which defines the distribution of the pressure load on the cylinder [18][19][20]. The boundary layer and the structure of the near wake behind a cylinder have always attracted attention for theoretical reasons and consequently for practical applications [7,[21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…The objective of this work is to examine the suitability of using LES turbulent model for the effective calculation of turbulent characteristics of the flow around a cylindrical object and to contribute to the addition of information about the flow field properties. There are investigated drag coefficient cd, pressure coefficient cp [18][19][20], and velocity profile in the wake behind the cylinder [7,[21][22][23], these quantities are essential for wind engineering. Specifically, the flow around the cylinder in this research is done for Re = 2.3 × 10 3 to 4 × 10 5 , which is an interval that includes the subcritical and critical region [16].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of Flow Around a Cylinder in Critical and Subcritical Regime

2021

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Modeling the wind flow around cylindrical buildings is one of the problems within urban physics. Despite the simple geometry of the cylinder, it is an interesting physical phenomenon. Partial knowledge of flow field properties can be found in the literature, but in terms of their use for practical tasks, the data are still incomplete. The authors performed a numerical analysis of the flow around the smooth cylinder in the subcritical and critical regime for Reynolds numbers in the range of Re = 2.3 × 103 to 4 × 105. Turbulent flow was solved using LES model and the numerical solution was compared with available data from experiments or standard. Analysis of the mean stream velocity showed the elongation of the core of the wake with decreasing Re. The pressure coefficient evaluation showed a big difference between its distribution in the subcritical and critical regime. In the subcritical regime, a significant increase in the minimum value and a shift of the extreme close to the axis of the cylinder is proven. The results of the drag coefficient confirm a significant decrease in the transition from subcritical to critical regime, which is indicated in the cited experiments.

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Section: Normalized Mean Stream Velocity In the Subcritical Regionmentioning

confidence: 80%