Model for three-dimensional distribution of liquid fuel in supersonic crossflows

Wu Liyin; Zhang Kouli; Li Chenyang; Li Qinglian

doi:10.11729/syltlx20170172

Volume 32 Issue 4

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Wu Liyin, Zhang Kouli, Li Chenyang, et al. Model for three-dimensional distribution of liquid fuel in supersonic crossflows[J]. Journal of Experiments in Fluid Mechanics, 2018, 32(4): 20-30. doi: 10.11729/syltlx20170172

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Model for three-dimensional distribution of liquid fuel in supersonic crossflows

doi: 10.11729/syltlx20170172

1.
Hypervelocity Aerodynamics Institute of China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China
2.
Science and Technology on Scramjet Laboratory, China Aerodynamics Research and Development Center, Mianyang Sichuan 621000, China
3.
Science and Techno-logy on Scramjet Laboratory, National University of Defense Technology, Changsha 410073, China

Received Date: 2017-12-14
Rev Recd Date: 2018-07-16
Publish Date: 2018-08-25

Abstract

Abstract

The spatial oscillation distribution characteristics of liquid jet in a supersonic crossflow were studied experimentally. Two models were built for predicting the oscillation distribution in the longitudinal and three-dimensional space, respectively. The experiments were carried out in a blow-type wind tunnel with Mach number of 2.1, and various conditions were studied, including stagnation pressure of the supersonic airflow (642~1010kPa), nozzle diameters (0.48~2.07mm), distance down from nozzle (10~125mm), practical pressure ranges (0.5~4.5MPa), and jet-gas momentum flux ratio ranges (0.11~10). Pulse laser background imaging method (PLBI) was used to shoot the transient spray distribution structures from the side and PIV method was used to capture the structures in cross-sections. A key parameter (Spray Proportion, γ) was defined to quantify the spatial oscillation distribution of the spray. A longitudinal spray oscillation distribution study was carried out, a spray boundary band model was established, and the model accuracy was verified. In addition, a piecewise function of the egg-shape curve and parabola was adopted to fit the contour line to establish the model for the spatial distribution of the spray in the cross-section. Based on various cross-section distributions with multi-parameters, a mathematical model is proposed to describe the liquid spray spatial distribution.
- scramjet,
- liquid jet,
- atomization,
- oscillation distribution

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References(25)

References

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