The laser measurement technology of combustion flow field

2014 ◽  
Author(s):  
Mingdong Wang ◽  
Guangyu Wang ◽  
Dongsheng Qu
Keyword(s):  
Flow Field ◽  
Measurement Technology ◽  
Laser Measurement ◽  
Combustion Flow

Absorption Model of Wavelength Modulation Spectroscopy in Combustion Flow Field

2019 ◽  
Vol 46 (7) ◽  
pp. 0711001
Author(s):  
张步强 Buqiang Zhang ◽  
许振宇 Zhenyu Xu ◽  
刘建国 Jianguo Liu ◽  
夏晖晖 Huihui Xia ◽  
聂伟 Wei Nie ◽  
...  
Keyword(s):  
Flow Field ◽  
Wavelength Modulation Spectroscopy ◽  
Absorption Model ◽  
Wavelength Modulation ◽  
Modulation Spectroscopy ◽  
Combustion Flow

scholarly journals Hybrid Adaptive Wavelet-Based Optical Flow Algorithm for Background Oriented Schlieren (BOS) Experiments

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Xin-yu Zhang ◽  
Li-Ming Wang ◽  
Bin Liu ◽  
Yue Luo ◽  
Xing-cheng Han
Keyword(s):  
Flow Field ◽  
Optical Flow ◽  
Measurement Technology ◽  
Refractive Index Gradient ◽  
Adaptive Wavelet ◽  
Flow Algorithm ◽  
Current Algorithm ◽  
Index Gradient ◽  
Background Oriented Schlieren ◽  
Flow Field Measurement

Quantitative analysis of the flow field is an effective method to study hydrodynamics. As a flow field measurement technology, the Background Oriented Schlieren (BOS) is widely used. However, it is difficult to measure the complex transparent flow field (flow field with large refractive index gradient) using the BOS experiment. In order to overcome this difficulty and improve the accuracy of the BOS experiment, this paper presents a hybrid adaptive wavelet-based optical flow algorithm for the BOS. The current algorithm is a combination of the traditional optical flow algorithm and the wavelet-based optical flow algorithm. By adding the initial value constraints, the adaptive scale constraints, and the adaptive regularization constraints, the algorithm can effectively overcome the above-mentioned difficulty and also improve its accuracy. To further illustrate the feasibility of the proposed method, this paper uses the simulation data, the data of the DNS datasets, and the data of the BOS experiment to verify the performance of the algorithm. The experiment of comparing the proposed algorithm with the existing ones is carried out on the DNS datasets and the data of the BOS experiment. Finally, the proposed method is verified by a practical BOS experiment. The results show that the proposed algorithm can effectively improve the measurement accuracy of displacements.

scholarly journals Research on combustion flow field imaging method based on ray casting algorithm

AIP Advances ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 055022 ◽  
Author(s):  
Min Yao ◽  
Yueqi Zhang ◽  
Min Zhao ◽  
Ruipeng Guo ◽  
Jun Xu
Keyword(s):  
Flow Field ◽  
Imaging Method ◽  
Ray Casting ◽  
Combustion Flow ◽  
Ray Casting Algorithm ◽  
Field Imaging

Feature-Section-Criterion for Predicting Lean Blowout and Comparison Research

2013 ◽  
Author(s):  
Zhibo Zhang ◽  
Hongtao Zheng ◽  
Honglei Yang ◽  
Ren Yang ◽  
Qian Liu ◽  
...  
Keyword(s):  
Experimental Data ◽  
Flow Field ◽  
New Method ◽  
Engineering Applications ◽  
Lean Blowout ◽  
Comparison Research ◽  
Annular Combustor ◽  
Combustion Flow ◽  
Feature Section

Lean blowout (LBO) plays an important role in combustor performance. A new method named Feature-Section-criterion (FSC) for predicting the LBO of annular combustor has been put forward and expounded in this paper. A CFD software FLUENT has been used to simulate the combustion flow field of an annular combustor. The process of blowout and effects of flow split among swirlers and primary holes have been researched by using of FSC. The result shows that the predictions of FSC are in agreement with corresponding experimental data. So this method for predicting lean blowout is reliable and can be used for engineering applications.

scholarly journals Parametric effects on the combustion flow field of a typical strut-based scramjet combustor

2011 ◽  
Vol 56 (35) ◽  
pp. 3871-3877 ◽  
Author(s):  
Wei Huang ◽  
ZhenGuo Wang ◽  
ShiBin Luo ◽  
Jun Liu
Keyword(s):  
Flow Field ◽  
Scramjet Combustor ◽  
Parametric Effects ◽  
Combustion Flow

scholarly journals Temperature measurement in combustion flow field with femtosecond laser-induced filament

2020 ◽  
Vol 69 (23) ◽  
pp. 234207
Author(s):  
Shuai-Yao Li ◽  
Da-Yuan Zhang ◽  
Qiang Gao ◽  
Bo Li ◽  
Yong He ◽  
...  
Keyword(s):  
Flow Field ◽  
Femtosecond Laser ◽  
Temperature Measurement ◽  
Combustion Flow

scholarly journals A Preliminary Calculation of the Combustion Recirculating Flow Behind Flame-Holders

1985 ◽  
Author(s):  
C. F. Zeng ◽  
J. X. Zhao ◽  
Z. T. Ding
Keyword(s):  
Flow Field ◽  
Equivalence Ratio ◽  
Variable Density ◽  
Combustion Model ◽  
Preliminary Calculation ◽  
Flame Spreading ◽  
Inlet Velocity ◽  
Recirculating Flow ◽  
Combustion Flow ◽  
Recirculation Length

In this paper the numerical method is adopted to predict the combustion recirculating flow behind flame-holders. A modified k-ε turbulence model and Magnussen’s combustion model are employed. Becouse of the large variation of density in combustion flow field, the influences of variable density have been considered. The results predicted include: the combustion recirculating flow field and the flame spreading; the variation of recirculation length with equivalence ratio, and inlet velocity, etc. All of these are qualitatively good comparing with experimental results.

Applications of measurement techniques based on lasers in combustion flow field diagnostics

2018 ◽  
Vol 11 (4) ◽  
pp. 531-549
Author(s):  
刘晶儒 LIU Jing-ru ◽  
胡志云 HU Zhi-yun
Keyword(s):  
Flow Field ◽  
Measurement Techniques ◽  
Combustion Flow
Sign in / Sign up

Export Citation Format

Share Document