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Full-Text Articles in Aerospace Engineering
Material Properties And Microstructural Characterization Of Specimens, T.J. Silverman, Allison Kinney, B. South, W. Yong, J.H. Koo
Material Properties And Microstructural Characterization Of Specimens, T.J. Silverman, Allison Kinney, B. South, W. Yong, J.H. Koo
Allison Kinney
The HiQ upgrade to the 3D Systems Vanguard selective laser sintering (SLS) machine incorporates a revised thermal calibration system and new software. This paper quantifies differences in mechanical and morphological properties of specimens built first using a Vanguard HS (high-speed) system and again using the same system with the HiQ upgrade applied. Standard specimens are built from DuraForm PA material and tested for tensile modulus, tensile strength, elongation at break, flexural modulus and Izod impact strength. The design of the specimen battery, the conduction of the tests and the significance of the results are discussed. The upgrade is found to …
Reconfiguration Of The Receiver System For Sodium Doppler Wind/Temperature Lidar, Vardan Semerjyan, Tao Yuan
Reconfiguration Of The Receiver System For Sodium Doppler Wind/Temperature Lidar, Vardan Semerjyan, Tao Yuan
Vardan Semerjyan
Sodium (Na) Faraday filters based spectrometer is a relatively new instrument to study sodium nightglow [Harrell et al., 2010] as well as atmospheric chemistry in the mesopause region. Successful spectrometer measurement demands highly accurate control of filter temperature. The ideal operation site for this Na spectrometer would be an isolated location with minimum nocturnal sky background. Thus, the remote and automatic control of the filter temperature is a requirement for such operation, whereas current temperature controllers can only be adjusted manually by the operator. The proposed approach is aimed not only to enhance the accuracy of the temperature control but …
Proportional-Integral-Derivative (Pid) Temperature Control & Data Acquisition System For Faraday Filter Based Sodium Spectrometer, Vardan Semerjyan, Tao Yuan
Proportional-Integral-Derivative (Pid) Temperature Control & Data Acquisition System For Faraday Filter Based Sodium Spectrometer, Vardan Semerjyan, Tao Yuan
Vardan Semerjyan
Sodium (Na) Faraday filters based spectrometer is a relatively new instrument to study sodium nightglow [Harrell et al., 2010] as well as atmospheric chemistry in the mesopause region. Successful spectrometer measurement demands highly accurate control of filter temperature. The ideal operation site for this Na spectrometer would be an isolated location with minimum nocturnal sky background. Thus, the remote and automatic control of the filter temperature is a requirement for such operation, whereas current temperature controllers can only be adjusted manually by the operator. The proposed approach is aimed not only to enhance the accuracy of the temperature control but …
This Is A Submission Of Testable Proportions, Gillian K. Hadfield
This Is A Submission Of Testable Proportions, Gillian K. Hadfield
Gillian K Hadfield
No abstract provided.
Evaluation Study Of Building-Resolved Urban Dispersion Models, J. E. Flaherty, K. J. Allwine, M. J. Brown, W. J. Coirier, S. C. Ericson, O. R. Hansen, A. H. Huber, S. Kim, M. J. Leach, J. D. Mirocha, R. K. Newsom, G. Patnaik, I. Senocak
Evaluation Study Of Building-Resolved Urban Dispersion Models, J. E. Flaherty, K. J. Allwine, M. J. Brown, W. J. Coirier, S. C. Ericson, O. R. Hansen, A. H. Huber, S. Kim, M. J. Leach, J. D. Mirocha, R. K. Newsom, G. Patnaik, I. Senocak
Inanc Senocak
For effective emergency response and recovery planning, it is critically important that building-resolved urban dispersion models be evaluated using field data. Several full-physics computational fluid dynamics (CFD) models and semi-empirical building-resolved (SEB) models are being advanced and applied to simulating flow and dispersion in urban areas. To obtain an estimateof the current state-of-readiness of these classes of models, the Department of Homeland Security(DHS) funded a study to compare five CFD models and one SEB model with tracer data from the extensive Midtown Manhattan field study(MID05) conducted during August 2005 as part of the DHS Urban Dispersion Program (UDP; Allwineand Flaherty …