Possible energy-loss mechanism in Venturi tubes

1975 ◽  
Vol 11 (7) ◽  
pp. 621-622
Author(s):  
�. M. Kunina ◽  
V. V. Piotrovskii
Keyword(s):  
Energy Loss ◽  
Loss Mechanism ◽  
Energy Loss Mechanism

scholarly journals Energy Loss in a MEMS Disk Resonator Gyroscope

Micromachines ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 493 ◽  
Author(s):  
Xie ◽  
Hao ◽  
Yuan
Keyword(s):  
Energy Loss ◽  
Bias Voltage ◽  
High Performance ◽  
Resonance Structure ◽  
Dissipated Energy ◽  
Thermoelastic Damping ◽  
Disk Resonator ◽  
Loss Mechanism ◽  
Energy Loss Mechanism ◽  
Anchor Loss

Analysing and minimizing energy loss is crucial for high performance disk resonator gyroscopes (DRGs). Generally, the primary energy loss mechanism for high vacuum packaged microelectromechanical system (MEMS) resonators includes thermoelastic damping, anchor loss, and electronic damping. In this paper, the thermoelastic damping, anchor loss, and electronic damping for our DRG design are calculated by combining finite element analysis and theoretical derivation. Thermoelastic damping is the dominant energy loss mechanism and contributes over 90% of the total dissipated energy. Benefiting from a symmetrical structure, the anchor loss is low and can be neglected. However, the electronic damping determined by the testing circuit contributes 2.6%–9.6% when the bias voltage increases from 10 V to 20 V, which has a considerable impact on the total quality factor (Q). For comparison, the gyroscope is fabricated and seal-packaged with a measured maximum Q range of 141k to 132k when the bias voltage varies. In conclusion, thermoelastic damping and electronic damping essentially determine the Q of the DRG. Thus, optimizing the resonance structure and testing the circuit to reduce energy loss is prioritized for a high-performance DRG design.

Energy Loss Mechanism in Organic and Inorganic Light-Emitting Diodes

2008 ◽  
Vol 20 (16) ◽  
pp. 1408-1410 ◽  
Author(s):  
Jongwoon Park ◽  
Taewon Kim ◽  
Jongho Lee ◽  
Dongchan Shin
Keyword(s):  
Energy Loss ◽  
Light Emitting Diodes ◽  
Loss Mechanism ◽  
Light Emitting ◽  
Energy Loss Mechanism

Energy Loss Mechanism of Upconversion Core/Shell Nanocrystals

2019 ◽  
Vol 123 (36) ◽  
pp. 22674-22679 ◽  
Author(s):  
Yanqing Hu ◽  
Qiyue Shao ◽  
Yan Dong ◽  
Jianqing Jiang
Keyword(s):  
Energy Loss ◽  
Core Shell ◽  
Loss Mechanism ◽  
Energy Loss Mechanism

Numerical investigation of energy loss mechanism of mixed-flow pump under stall condition

2020 ◽  
Author(s):  
Wei Li ◽  
Leilei Ji ◽  
Enda Li ◽  
Weidong Shi ◽  
Ramesh Agarwal ◽  
...  
Keyword(s):  
Energy Loss ◽  
Numerical Investigation ◽  
Mixed Flow ◽  
Loss Mechanism ◽  
Energy Loss Mechanism ◽  
Flow Pump

Detailed studies on energy loss mechanism in phosphor-sensitized fluorescent polymer light-emitting devices

2010 ◽  
Vol 107 (5) ◽  
pp. 054515 ◽  
Author(s):  
Tengling Ye ◽  
Shiyang Shao ◽  
Jiangshan Chen ◽  
Zhenyu Chen ◽  
Lixiang Wang ◽  
...  
Keyword(s):  
Energy Loss ◽  
Loss Mechanism ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Energy Loss Mechanism ◽  
Fluorescent Polymer ◽  
Polymer Light Emitting Devices

Anchor Design Affects Dominant Energy Loss Mechanism in a Lamé Mode MEM Resonator

2020 ◽  
Vol 29 (5) ◽  
pp. 860-866
Author(s):  
Gabrielle D. Vukasin ◽  
Veronica K. Sanchez ◽  
Janna Glaze ◽  
Nicholas E. Bousse ◽  
Nathan Bissel ◽  
...  
Keyword(s):  
Energy Loss ◽  
Loss Mechanism ◽  
Energy Loss Mechanism ◽  
Anchor Design
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