Comparison of orifice and slotted plate flowmeters

1994 ◽  
Vol 5 (2) ◽  
pp. 71-77 ◽  
Author(s):  
G.L. Morrison ◽  
K.R. Hall ◽  
J.C. Holste ◽  
M.L. Macek ◽  
L.M. Ihfe ◽  
...  
Keyword(s):  
Slotted Plate

Vibration control for slotted plate using structural intensity method

2018 ◽  
Vol 07 (01n02) ◽  
pp. 1850006
Author(s):  
Xiangyu Du ◽  
Rong Huang ◽  
Balaji Vengatachalam ◽  
Zishun Liu
Keyword(s):  
Vibration Control ◽  
Chemical Potential ◽  
Optimal Position ◽  
New Approach ◽  
Structural Intensity ◽  
Exciting Frequency ◽  
New Strategy ◽  
Slotted Plate ◽  
Vibration Performance ◽  
Excitation Conditions

In this paper, we study the vibration performance of simply supported slotted plate using structural intensity (SI) method. First, the SI distribution of the slotted plate under given excitation for different slot depths is obtained using finite element methods. The SI streamline of each case shows that the SI distribution can be significantly affected by adjusting the slot depth. The optimal position of dampers which can effectively implement vibration control of slotted plate for the fixed value of exciting frequency can be obtained from the SI streamline distribution. In case of changing vibrating frequencies, a new strategy of vibration control by adding soft material (hydrogel) layers is proposed. The main advantage of this strategy is that the properties of hydrogel can be easily adjusted by changing the chemical potential, thereby achieving the desired vibration control for different excitation conditions. The effectiveness of the proposed vibration control using hydrogel layers is investigated using SI method. The SI distribution and SI streamlines of the slotted plate with the new vibration control show that the proposed strategy is convenient. Our proposed method conceptualizes a new approach toward vibration control using constrained hydrogel layer.

scholarly journals Printed UWB Antenna with Coupled Slotted Element for Notch-Frequency Function

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
X. L. Bao ◽  
M. J. Ammann
Keyword(s):  
Parametric Study ◽  
Return Loss ◽  
Measured Data ◽  
Monopole Antenna ◽  
Frequency Function ◽  
Uwb Antenna ◽  
Printed Monopole Antenna ◽  
Printed Monopole ◽  
Slotted Plate

A novel printed monopole antenna employing a slotted-plate, which is electromagnetically coupled to the microstrip-fed planar element, is proposed to provide notch-frequency function. This technique enables stopband characteristics with improved control, compared to placing the slot in the microstrip-fed element. A detailed investigation of the rejectband properties has been made for the UWB antenna. Measured data for the optimized case show the 10 dB return loss bandwidth to be 9.8 GHz (from 2.80 GHz to 12.60 GHz) with a notchband frequency from 5.15 GHz to 5.825 GHz. Propagation measurements indicate that the electromagnetically coupled slot provides a greater reduction in stopband gain for the three principal planes, compared to placing the slot in the fed element. This is desirable to mitigate interference from WLAN systems. A full parametric study of the antenna is presented.

Comparison of Test Results for Flat-Plate, Transpired Flat-Plate, Corrugated, and Transpired Corrugated Solar Air Heaters

1983 ◽  
Vol 105 (3) ◽  
pp. 231-236 ◽  
Author(s):  
S. J. Rhee ◽  
D. K. Edwards
Keyword(s):  
Flat Plate ◽  
Perforated Plate ◽  
Metal Plate ◽  
Test Results ◽  
Absorber Plate ◽  
Technical Improvement ◽  
Black Metal ◽  
Slotted Plate ◽  
Teflon Film

Five selective-black-metal-plate experimental air heaters with and without transpiration were designed, fabricated, and tested to compare their technical merits. All were 61 cm × 61 cm (2ft × 2ft), double-glazed with low-iron glass, and those with transpiration contained an additional Teflon film to form a plenum above the absorber plate. The configurations were (i) a reference collector with flow on back only, (iia) a transpired slotted plate, (iib) a transpired micro-perforated plate, (iii) a corrugated plate with flow on back, and (iv) a transpired slotted corrugated plate. The results show the magnitude of technical improvement that can be obtained through the slotting, perforating, and corrugating strategems.

scholarly journals Transmission and incidence losses for a slotted plate

1998 ◽  
Author(s):  
Jack Wilson ◽  
Rodrick Chima ◽  
Beric Skews
Keyword(s):  
Slotted Plate

scholarly journals Volume reconstruction of a plane jet impinging on a slotted plate using the phase averaging technique

2017 ◽  
Vol 139 ◽  
pp. 404-409 ◽  
Author(s):  
J. Hamdi ◽  
H.H. Assoum ◽  
K. Abed-Meraïm ◽  
A. Sakout
Keyword(s):  
Volume Reconstruction ◽  
Averaging Technique ◽  
Phase Averaging ◽  
Slotted Plate ◽  
Plane Jet

High Instantaneous Efficiency and High Flow Rate Slotted-Plate Solar Collectors

2013 ◽  
Vol 860-863 ◽  
pp. 88-92
Author(s):  
Zhen Xing Zhang ◽  
Yong Min He ◽  
Xiao Dong Li ◽  
Jin Yuan Zhou ◽  
Xiao Zhi Liu ◽  
...  
Keyword(s):  
Flow Rate ◽  
Working Environment ◽  
Solar Collectors ◽  
Flow Rates ◽  
Key Factor ◽  
The Common ◽  
Slotted Plate ◽  
Heating Up ◽  
Near Future ◽  
Working Efficiency

With the highlight of less regards to insulation measures and the key factor of the flow rates, slotted-plate solar collectors possess rather lower thickness and lighter mass, higher heat production, and better matching with various buildings compared with the common plate solar collectors. Results show that a much higher instantaneous efficiency could be obtained by increasing the flow rates suitably in a low-temperature working environment. The average efficiency could reach up to 51% with the maximum instantaneous efficiency of 61%. Based on the analysis of the relation between instantaneous efficiency and flow rates or the relation between instantaneous efficiency and the temperature difference of the inlet and the outlet water, a experiential formula for the optimal flow rate is proposed to improve the heating-up rates and working efficiency. The performances investigation of slotted-plate solar collectors would pave a way for their widespread and positive applications in the near future.

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