Research on the aero-thermal effects by 3D analysis model of the optical window of the infrared imaging guidance

2014 ◽  
Author(s):  
Bo Xu ◽  
Lin Li ◽  
Ying Zhu
Keyword(s):  
Thermal Effects ◽  
Infrared Imaging ◽  
3D Analysis ◽  
Analysis Model ◽  
Optical Window ◽  
Imaging Guidance

Study on Dynamic IR Image Generation of Space Target

2014 ◽  
Vol 1044-1045 ◽  
pp. 1343-1348
Author(s):  
Wu Can He ◽  
Shou Yi Liao ◽  
Zuo Yu Zhang ◽  
He Xin Zhang
Keyword(s):  
Infrared Imaging ◽  
Three Dimensional ◽  
Orbit Space ◽  
Guidance System ◽  
Image Generation ◽  
Hardware In The Loop ◽  
Imaging Guidance ◽  
Infrared Star ◽  
Objective Basis ◽  
Space Target

Dynamic IR image generation of space target is one of the key technologies in hardware in the loop simulation for the infrared imaging guidance system. The three-dimensional entity model is created in the Creator, Sinda/Fluint is used to analyze each part of dynamic infrared radiation characteristics from on-orbit Space Target, on the basis of the LRS infrared star catalogues, celestial background modeling is built. In Vega, the dynamic IR image of space target is generated. The simulation results show that the dynamic IR image of Space Target provide the important objective basis for the hardware in the loop simulation for the infrared imaging guidance system.

scholarly journals ASA Algorithm Combined with Current Simulation Method (CSM) for the Magnetic Induction under HV Power Lines in 3D Analysis Model

2020 ◽  
Vol 9 (2) ◽  
pp. 7-18
Author(s):  
R. Djekidel ◽  
S.-A. Bessedik
Keyword(s):  
Magnetic Induction ◽  
Simulated Annealing Algorithm ◽  
Hybrid Approach ◽  
Simulation Method ◽  
3D Analysis ◽  
Analysis Model ◽  
Optimal Position ◽  
Annealing Algorithm ◽  
Overhead Power Line ◽  
Good Agreement

In this paper, a new hybrid approach to modeling the magnetic induction produced by HV overhead power line which combines the current simulation method (CSM) and adaptive simulated annealing algorithm (ASA) is discussed. The aim of the ASA algorithm is to find the optimal position and number of current loops used in bundles conductors for an accurate magnetic induction. Several parameters affecting the magnetic induction have been studied; it is observed that, taking into account the effect of conductor sag is much more interesting particularly at the mid-span length where the magnetic induction becomes very significant, the results also indicated that the maximum magnetic induction levels are less than the limits recommended by the ICNIRP standard for general public and occupational exposure. The calculated results are compared with those obtained from the COMSOL 4.3a Multiphysics software. A good agreement has been reached.

A STUDY ON PERFORMANCE OF AIR-TO-AIR HEXAGONAL PLASTIC PLATE HEAT EXCHANGER

2014 ◽  
Vol 22 (01) ◽  
pp. 1450002 ◽  
Author(s):  
QING CUI ◽  
MYUNG-DO OH
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Plate Heat Exchanger ◽  
3D Analysis ◽  
Plastic Plate ◽  
Analysis Model ◽  
Plate Heat ◽  
Crest Length

In this research, 3D analysis model of air-to-air hexagonal plastic plate heat exchanger (HX) is developed numerically and compared with the available experiment. The heat transfer performances with polypropylene (PP) and aluminum (Al) indicate that PP HX can transfer heat as good as Al under this HX application. On the basis of this model, the crest length, the crest pitch and the inlet and outlet chamfer size are designed as three key parameters to improve the heat transfer performances of HX.

scholarly journals Transparent PET optical window for microfluidic cell culture device

2017 ◽  
Author(s):  
Wenfa Ng
Keyword(s):  
Thin Film ◽  
Cell Culture ◽  
Infrared Spectrum ◽  
Microfluidic Device ◽  
Infrared Imaging ◽  
Growth Chamber ◽  
Optical Window ◽  
Optically Transparent ◽  
Microfluidic Cell Culture ◽  
Imaging And Spectroscopy

Microfluidic cell culture chambers have enabled the isolation, culture and growth of various species of microorganisms and human cells. However, based on elastomers such as poly(dimethyl siloxane) (PDMS), these culture devices are not readily amenable to imaging or spectroscopy in the optical and infrared spectrum. Specifically, while PDMS is optically transparent, significant diffraction and reflection of light waves through the material does not endow it for use with various modes of spectroscopy where real-time imaging applications have been developed. For example, optical or infrared spectroscopy of the microfluidic device, through an optically transparent window, could provide readout of the types and concentration of fluorescent reporters within the growth chamber, which are usually correlated with gene expression or molecular binding events. Thus, there is a need for an optically transparent window for microfluidic cell culture device with the necessary mechanical strength, and which enables both optical and infrared imaging and spectroscopy to be performed. To this end, a flexible optically transparent polymer, poly(ethylene terephthalate), PET, could serve as the optical window of a microfluidic cell culture device. Given its optical transparency and flexibility, the PET thin film could be layered on an imaging area of a PDMS microfluidic device, that allows for optical and infrared imaging and spectroscopy. Thus, using readily available PET thin film, an optically transparent window could be placed on a PDMS microfluidic growth chamber for imaging or spectroscopy in the optical and infrared spectrum. Interested researchers may want to expand on the idea presented here.

scholarly journals Numerical techniques for design calculations of longitudinal bending in buried steel pipes subjected to lateral Earth movements

2019 ◽  
Vol 6 (7) ◽  
pp. 181550
Author(s):  
Mohamed Almahakeri ◽  
Ian D. Moore ◽  
Amir Fam
Keyword(s):  
Finite Element ◽  
Geometrical Nonlinearity ◽  
Linear Displacement ◽  
Soil Parameters ◽  
3D Analysis ◽  
Analysis Model ◽  
Element Analysis ◽  
Steel Pipes ◽  
Soil Loading ◽  
Longitudinal Bending

This paper presents simplified finite-element analysis procedures based on geometrical nonlinearity and ductile Mohr–Coulomb–Davis plasticity for analysis of bending behaviour of steel pipes subjected to lateral soil loading. A simple, and easy to implement, user-defined subroutine to represent soil stiffness using the Janbu model is also presented and discussed. The development of a three-dimensional (3D) finite-element model is presented, and its evaluation against experimental measurements is discussed. Data are presented for different burial depths of the pipe, including soil loading on the pipe as well as 3D responses, longitudinal bending deflections and pressure distribution along the pipe. It was shown that numerical analyses which include soil modulus dependency on confining pressure lead to effective 3D calculations of pulling forces, bending moments along the pipeline and flexural deformations, based on measured soil parameters. The 3D analysis model requires the use of lower order (linear displacement) elements, which overestimated peak mobilized load. However, those 3D calculations effectively provided the progress of both the load–deflection and longitudinal bending response of the steel pipe at embedment ratios up to 5 where most energy pipelines are buried.

Tracking the key point of a building in infrared imaging guidance

2013 ◽  
Author(s):  
Yi-mei Tan ◽  
Fu-gen Zhou ◽  
Ting Jin
Keyword(s):  
Infrared Imaging ◽  
Imaging Guidance
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