每年出版 12 期
ISSN 打印: 1044-5110
ISSN 在线: 1936-2684
IF:
1.2
5-Year IF:
1.8
Immediacy Index:
0.3
Eigenfactor:
0.00095
JCI:
0.28
SJR:
0.341
SNIP:
0.536
CiteScore™::
1.9
H-Index:
57
Indexed in
TURBULENCE UNDER QUASI-CAVITATING CONDITIONS: A NEW SPECIES?
Get access
摘要
This article presents measurements of turbulent fluctuations in an upscaled, two-dimensional model of a plain-orifice injector, with and without the presence of cavitation simulated by an air bubble. The measurements were made at different locations in the orifice cross section, and at different planes along the direction of the flow. Two-color laser Doppler velocimetry data allowed the calculation of Reynolds stresses as well as turbulence power spectra. The results show that the turbulence in the presence of simulated or quasi-cavitation behaves quite differently from the case without cavitation: it changes more radically with changes on the Reynolds number and seems to be fairly independent of the magnitude of the Reynolds stresses. These observations cannot be explained by using conventional shear-induced turbulence models. Experiments with forced cavity fluctuations show an increased receptivity at certain frequencies.
-
Tharakan T. John, Rafeeque T.A., The role of backpressure on discharge coefficient of sharp edged injection orifices, Aerospace Science and Technology, 49, 2016. Crossref
-
Tseng Kuo-Tung, Collicott Steven H., Experimental and numerical investigations of mechanisms in fluidic spray control, International Journal of Multiphase Flow, 61, 2014. Crossref
-
Payri F., Payri R., Salvador F.J., Martínez-López J., A contribution to the understanding of cavitation effects in Diesel injector nozzles through a combined experimental and computational investigation, Computers & Fluids, 58, 2012. Crossref
-
Soriano Palao O. J., Mouvanal S., Numerical Study of the Effect of Conicity and Inlet Rounding of Diesel Injector Nozzles and Its Influence on Spray Characteristics, SAE Technical Paper Series, 1, 2011. Crossref
-
Ramamurthi K., Nandakumar K., Patnaik R. K., Characteristics of Sprays Formed by Impingement of a Pair of Liquid Jets, Journal of Propulsion and Power, 20, 1, 2004. Crossref
-
Tseng Kuotung, Collicott Steven, Internal Flows in Fluidic Spray Control, 36th AIAA Fluid Dynamics Conference and Exhibit, 2006. Crossref
-
Collicott Steven, Yeh Che-Ping, Tseng Kuo-Tung, Manipulating Inlet Cavitation to Control Spray Properties, 39th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit, 2003. Crossref
-
Salvador F J, Hoyas S, Novella R, Martínez-López J, Numerical simulation and extended validation of two-phase compressible flow in diesel injector nozzles, Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 225, 4, 2011. Crossref
-
Yuan Cong, Song Jinchun, Liu Minghe, Investigation of flow dynamics and governing mechanism of choked flow for cavitating jet in a poppet valve, International Journal of Heat and Mass Transfer, 129, 2019. Crossref
-
Payri F., Bermúdez V., Payri R., Salvador F.J., The influence of cavitation on the internal flow and the spray characteristics in diesel injection nozzles, Fuel, 83, 4-5, 2004. Crossref
-
Lagumbay Randy S., Vasilyev Oleg V., Haselbacher Andreas, Wang Jin, Numerical Simulation of a Supersonic Three-Phase Cavitating Jet Flow Through a Gaseous Medium in Injection Nozzle, Energy Conversion and Resources, 2005. Crossref