Thermal/tribological effects of superimposed ultrasonic vibration on viscoelastic responses and mold-filling capacity of optical glass: A comparative study

Luo, Hong; Yu, Jingkun; Lou, Haiqin; Huang, Kuo‐Cheng; Hu, Junzhi; Xu, Binchao

doi:10.1016/j.ultras.2020.106234

Cited by 11 publications

(5 citation statements)

References 49 publications

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“…However, in terms of sustainable manufacturing, processing large-size glass using the GMP method has several disadvantages, including low efficiency, uneven heating, large temperature gradients, and low optical properties of the glass components after processing. By combining advanced technologies, such as ultrasonic-assisted GMP [31][32][33] and laser-assisted GMP [18,34,35], the efficiency and effectiveness of the hot bending process can be improved, resulting in higher-quality and more accurate glass elements. In a follow-up study, we will conduct further research on these two auxiliary processing technologies.…”

Section: Discussionmentioning

confidence: 99%

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Chen

Zhang

et al. 2023

Metals

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In recent years, as an important functional material, glass has been widely used in architecture, electronics, optics, and other fields. As an emerging glass processing technology, the glass molding process (GMP) has received widespread attention and research in recent years. In this paper, we study the modeling and analysis of different heat transfer strategies for the energy efficiency of large-sized automotive instrument glass. The heat transfer model of the metal heating plate–conducting plate mold is established, the thermal energy efficiency in the forming process of large automobile glass is analyzed, and the energy efficiency of the mold in the heating stage is compared. The energy consumption per piece generated by the GMP heating device is reduced from 4865.2 to 4668.5 kJ, a reduction of 4.04%. By optimizing the heat flow density, the energy consumption per piece generated by the GMP heating device was reduced from 4865.2 to 4625.5 kJ, a reduction of 4.92%, meeting the sustainable manufacturing requirements.

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Section: Discussionmentioning

confidence: 99%

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Chen

Zhang

et al. 2023

Metals

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“…There is no denying the extensive ongoing investigations on glass science and technology, which discuss discoveries in photonics and optical applications [1]. Rapid development and innovation in telecommunications enhance the production of new materials for optical fiber and laser [2]. A wide range of glass materials has often been produced to manufacture optical devices.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of neodymium, holmium, erbium, and samarium (oxides) in zinc-borotellurite glass: Physical and optical comparative analysis

Azlina,

Azlan,

Suriani

et al. 2024

Kompl. Ispolz. Min. Syra = Compl. Use of Min. Resour.

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Investigating the effect of different types of rare-earth oxides on zinc borotellurite glass is important to determine the potential application in optical devices. The addition of rare-earth oxides in zinc borotellurite glass is well-known to enhance the optical properties due to the effects of 4f-4f transitions. In this work, we aim to compare the effect of different rare-earth oxides on zinc borotellurite glass denoted as ZBTNd, ZBTHo, ZBTEr and ZBTSm. The glass samples were successfully fabricated via the melt-quenched technique. The physical investigation of the glasses has been done by measuring the density and molar volume. It was found that ZBTNd glass has the lowest density than the other glasses due to the small atomic radius in neodymium oxide. High-density value for ZBTHo glass shows potential to be used as radiation shielding properties. The high value of molar volume for ZBTNd glass is advantageous for fiber optics as ZBTNd glass has good performance in elasticity. It was found that ZBTEr has a lower refractive index than the other glasses due to low dispersion characteristics. However, ZBTEr glass has good performance to be used in optical communication applications. It was found that the optical absorption shifts to a longer wavelength beginning from ZBTEr > ZBTHo > ZBTNd > ZBTSm. The optical band gap energy for ZBTEr glass is higher than the other glasses due to the Coulomb repulsion energy for erbium which is greater than neodymium and samarium and slightly higher than holmium. The pattern of electronic polarizability for all glasses was found as follows ZBTSm>ZBTNd>ZBTEr>ZBTHo. The optical basicity for ZBTEr was found highest which indicates a higher acidity, meanwhile, the ZBTNd glass has the lowest value which corresponds to a higher basicity.

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“…When bubbles burst, a shock wave will be naturally generated, which plays a good role in stirring, and the internal friction between dielectrics will form a charge and discharge in the bubble to produce luminescence, accompanied by high temperature and pressure. In addition, under the continuous action of ultrasonic, the internal temperature of the medium will rise significantly because of the sound energy absorption and internal friction of the medium. − Typically, the media might experience complicated chemical, physical, and other consequences as a result of the ultrasonic effects. , The widespread use of ultrasonic in many different fields has demonstrated that it has very powerful advantages. − …”

Section: Introductionmentioning

confidence: 99%

“…In addition, under the continuous action of ultrasonic, the internal temperature of the medium will rise significantly because of the sound energy absorption and internal friction of the medium. 7 − 9 Typically, the media might experience complicated chemical, physical, and other consequences as a result of the ultrasonic effects. 10 , 11 The widespread use of ultrasonic in many different fields has demonstrated that it has very powerful advantages.…”

Section: Introductionmentioning

confidence: 99%

Numerical Assessment of Combustion Behavior and Emission Formations in an Ultrasonic-Assisted Ignition Engine

Zhang,

Shi,

2023

ACS Omega

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By effective utilization of the dynamic mesh and coordinate transformation techniques, an ultrasonic horn is physically integrated in the chamber of an internal combustion engine. The consequences of multiple ultrasonic-fed strategies on the flow field, combustion process, and emission formation under the same working conditions are studied by numerical simulation. Based precisely on the bench test data, GT-Power and CONVERGE set up the original engine one-dimension (1d) and threedimension (3d) simulation models. The chamber pressure and heat release rate of the 1d and 3d models under a full load condition of 3000 r•min −1 were validated, and the maximum relative error is less than 5%, proving the accuracy of the model. By reforming the 3d numerical model, ultrasonics is added to the gasoline engine's combustion chamber. Six different ultrasonic-fed schemes with 20 kHz amplitude of 30−300 μm are typically selected for in-depth research. The larger the amplitude, the stronger the turbulent kinetic energy (TKE), and the maximum TKE exceeds 46.6% at the ignition time. Stronger TKE can energetically encourage the generation of OH, O, and H radicals and improve the combustion reaction rate, and the peak pressure (P MAX ) is increased by 1.9 MPa compared with scheme No. However, NO X and HC emissions gradually increase, reaching a maximum of 32.4 and 43.8%, respectively, while CO and soot emissions decrease, reaching a maximum of 11.4 and 11%, respectively. Four groups of ultrasonicfed schemes with an amplitude of 100 μm and frequency of 20−50 kHz are scientifically studied. The findings indicated that the TKE level steadily increases as the frequency increases and the in-cylinder TKE increases by 16.4% at ignition time. The increase in ultrasonic frequency can promote the generation of active free radicals and meaningfully improve the combustion reaction rate to a certain extent. The P MAX can be increased up to 1 MPa compared with scheme No. At the same time, the NO X , HC, and soot also increased considerably, reaching 31.8, 17.9, and 21.9%, respectively. The CO showed a downward trend but gradually slowed, with a maximum decline of 6.5% at 20 kHz. The above simulation analysis is based on the full load condition of 3000 r•min −1 , sufficiently proving that ultrasonics has a regulation effect on emissions and can achieve specific emissions through later optimization.

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Thermal/tribological effects of superimposed ultrasonic vibration on viscoelastic responses and mold-filling capacity of optical glass: A comparative study

Cited by 11 publications

References 49 publications

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Study of Heat Transfer Strategy of Metal Heating/Conduction Plates for Energy Efficiency of Large-Sized Automotive Glass Molding Process

Incorporation of neodymium, holmium, erbium, and samarium (oxides) in zinc-borotellurite glass: Physical and optical comparative analysis

Numerical Assessment of Combustion Behavior and Emission Formations in an Ultrasonic-Assisted Ignition Engine

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