Spray characteristics and controlling mechanism of fuel containing CO<sub>2

doi:10.1007/s11708-012-0180-3

Front Energ

2012, Vol. 6

Issue (1) : 80-88 https://doi.org/10.1007/s11708-012-0180-3

RESEARCH ARTICLE

Spray characteristics and controlling mechanism of fuel containing CO₂

Zhen HUANG¹(

), Jin XIAO¹, Xinqi QIAO¹, Gaozhi JIANG⁴, Yiming SHAO³, Seiichi SHIGA², Yasuhiro DAISHO⁴

1. Key Laboratory for Power Machinery and Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China; 2. Faculty of Engineering, Department of Mechanical System Engineering, Gunma University, Gunma 376-8515, Japan; 3. Faculty of Transportation Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 4. Faculty of Science and Engineering, Waseda University, Tokyo169-8555, Japan

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Abstract

This paper presents studies of spray characteristics and controlling mechanism of fuel containing CO₂. Using diesel fuel containing CO₂ gas, experiments were conducted on diesel hole-type nozzles and simple nozzles. The steady spray and transient spray characteristics were observed and measured by instantaneous shadowgraphy, high-speed photography, phase Doppler anemometry (PDA) and LDSA respectively. The effects of CO₂ concentration in the fuel, the injection pressure, the nozzle L/D ratio, surrounding gas pressure and temperature on the atomization behavior and spray pattern were evaluated. The results show that the injection of fuel containing CO₂ can greatly improve the atomization and produce a parabolic-shaped spray; and the CO₂ gas concentration, surrounding gas pressure, temperature and nozzle configuration have dominant influences on spray characteristics of the fuel containing CO₂. New insight into the controlling mechanism of atomization of the fuel containing CO₂ was provided.

Keywords spray characteristics fuel atomization fuel containing CO₂

Corresponding Author(s): HUANG Zhen,Email:z-huang@sjtu.edu.cn

Issue Date: 05 March 2012

Cite this article:

Zhen HUANG,Jin XIAO,Xinqi QIAO, et al. Spray characteristics and controlling mechanism of fuel containing CO_{2[J]. Front Energ,
2012, 6(1): 80-88.}

URL:

https://academic.hep.com.cn/fie/EN/10.1007/s11708-012-0180-3
https://academic.hep.com.cn/fie/EN/Y2012/V6/I1/80

Fig.1 Effect of gas concentration on spray pattern (Diesel nozzle /=5, nozzle diameter=0.3 mm, injection pressure=3 MPa)
(a) 0%CO; (b) 2.4%CO; (c) 8.4%CO; (d) 14.25%CO

Fig.2 Effect of gas concentration and injection pressure on SMD, measuring point 1 m downstream of the nozzle

Fig.3 Effect of gas concentration on SMD distribution along radial direction at =44 mm

Fig.4 Effect of gas concentration on axial velocity

Fig.5 Effect of gas concentration on radial velocity near the nozzle exit

Fig.6 Effect of / ratio on spray pattern (Simple nozzle, nozzle diameter= 0.3 mm, injection pressure= 5 MPa, CO mass fraction=14.25%)
(a) /=4; (b) / = 10; (c) / = 20; (d) / = 30; (e) / = 40; (f) / = 50

Fig.7 Effect of / ratio on SMD, measuring point 1 m downstream of the nozzle (Simple nozzle, nozzle diameter=0.3 mm, injection pressure=5 MPa)

Fig.8 Injection process of fuel containing CO gas (Injection pressure=5 MPa, CO concentration=14%, injection quantity=14 mg)

Fig.9 Injection process of fuel containing CO gas (Injection pressure=11 MPa, CO concentration=14%, injection quantity=24 mg)

Fig.10 Maximum spray width of fuel containing CO
(a) =5 MPa; (b) =11 MPa

Fig.11 Spray penetration of fuel containing CO gas
(a) =5 MPa; (b) =11 MPa

Fig.12 Calculated - relation diagram of CO-C12 binary system with different

Fig.13 Schematic diagram of fuel containing CO injection process

Fig.14 Effects of gas concentration and injection pressure on discharge coefficient

Fig.15 Effects of / ratio on discharge coefficient

Fig.16 Relationship between orifice flow pattern and pressure characteristics
(a) Flow with contraction and reattachment; (b) flow free from the wall

Fig.17 Schematic diagram of possible multiphase flow regime in the nozzle

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