A New Testing System of Missile-Target Encounter Based on Doppler Fuse

2013 ◽  
Vol 706-708 ◽  
pp. 609-612
Author(s):  
Guo Dong Wu ◽  
Qiang Liu ◽  
Yong Jie Xu ◽  
Zhi Jun Wang
Keyword(s):  
Experimental Investigation ◽  
Relative Velocity ◽  
Testing System ◽  
Early Design ◽  
Low Speed ◽  
The Real

With the purpose of reducing cost, improving the operability, and ensuring the safety, a low-speed testing system of the encounter of fuse and target was carried out. When the system working, the relative velocity of the target and fuse is in control in less than 10m/s, which is a shrink ratio of the real encounter. Experimental investigation shows that the low-speed encountering system can reach the requirements of Doppler radio fuse in the early design, which can help designers design a better fuse.

Performance of a Low Speed Axial Fan Under Distortion: An Experimental Investigation

2021 ◽  
Author(s):  
Sumit Tambe ◽  
Ugaitz Bartolom\xe9 Oseguera ◽  
Arvind Gangoli Rao
Keyword(s):  
Experimental Investigation ◽  
Axial Fan ◽  
Low Speed

Experimental Investigation on the Rubbing Process of Labyrinth Seals Against Honeycomb Liners

2020 ◽  
Author(s):  
Oliver Munz ◽  
Lisa Hühn ◽  
Corina Schwitzke ◽  
Hans-Jörg Bauer ◽  
Tim Fischer ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Service Life ◽  
Wear Mechanism ◽  
Relative Velocity ◽  
Labyrinth Seal ◽  
Honeycomb Structure ◽  
Labyrinth Seals ◽  
Mechanical Loads ◽  
Low Leakage ◽  
Mass Flows

Abstract Sealing systems contribute significantly to the efficiency of turbomachinery. Small gap widths, which are important for low leakage mass flows in labyrinth seals, combined with thermal and mechanical expansion of the rotor can lead to contact with the stator. During these so-called rubbing processes, it is necessary to make an accurate prediction with respect to the performance and service life of the seal. For this purpose, the influence of relative velocity in the contact (up to 165ms−1) and incursion rate (up to 0.5 mms−1) on the resulting thermal and mechanical loads as well as wear mechanisms are studied for the rubbing process between an inclined labyrinth seal fin and a honeycomb segment. Furthermore, different axial configurations of the seal fin with respect to the honeycomb structure are considered. The system reacts very sensitively to a change of the seal fin position relative to the honeycomb structure. The incursion per revolution reflects a change of the wear mechanism from abrasive to plastic for a certain value. The results of this study contribute to the optimization of labyrinth seals and the development of new types of liner materials as well as geometries.

Experimental Investigation of a 160% Scaled NASA Common Research Model at Low Speed Conditions

2019 ◽  
Author(s):  
Takahiro Uchiyama ◽  
Masataka Kohzai ◽  
Hajime Miki ◽  
Tomonari Hirotani ◽  
Norikazu Sudani ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Research Model ◽  
Low Speed

Experimental Investigation of Periodic Wind Gust Generated in a Low Speed Wind Tunnel

2014 ◽  
Author(s):  
Parag Deshpande ◽  
Shweta Singh ◽  
Prasobh Narayanan ◽  
Dinesh Babu ◽  
Balamurali Sundaramoorthy
Keyword(s):  
Experimental Investigation ◽  
Wind Tunnel ◽  
Wind Gust ◽  
Low Speed ◽  
Low Speed Wind Tunnel

Experimental Investigation of a Hydromechanical Scale Model of the Gerbil Cochlea

2008 ◽  
Author(s):  
Shuangqin Liu ◽  
Douglas A. Gauthier ◽  
Ethan Mandelup ◽  
Robert D. White
Keyword(s):  
Experimental Investigation ◽  
Characteristic Frequency ◽  
Basilar Membrane ◽  
Silicone Oil ◽  
Fluid Motion ◽  
Three Dimensional ◽  
Scale Model ◽  
Wkb Method ◽  
Laser Vibrometry ◽  
The Real

In this research, an uncoiled scale gerbil cochlea is designed and fabricated. The cochlea model is an uncoiled, 16 times scale model of the real gerbil cochlea and has only one duct. Both the basilar membrane width and the duct size vary along the length of the device, in analogy to the physiology. The cochlea duct is filled with silicone oil and driven by a modal exciter (shaker) at different frequencies. The movement of the basilar membrane is measured using laser vibrometry at different locations along the basilar membrane. The ratio of the basilar membrane velocity to drive velocity is computed and plotted. The characteristic frequency of the model varies from 7000 Hz at 2 cm from the base of the cochlea to 350 Hz at the 15 cm from the base. Two different viscosities silicone oil, 20 cSt and 500 cSt are used for the basilar membrane movement measurements. A WKB method is applied to the calculation of the basilar membrane movement of the scale cochlea model, in which the fluid motion is fully three dimensional.

Correction: Experimental Investigation of a 160% Scaled NASA Common Research Model at Low Speed Conditions

2019 ◽  
Author(s):  
Takahiro Uchiyama ◽  
Masataka Kohzai ◽  
Hajime Miki ◽  
Tomonari Hirotani ◽  
Norikazu Sudani ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Research Model ◽  
Low Speed
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