The amazing speediness of jamie cavanaugh12/25/2023 ![]() The currently recommended methods to scale model size, icing limit and test conditions are described. Nearly all of the experimental results presented have been obtained in sea-level tunnels. These results were based on visual comparisons of reference and scale ice shapes. Within the limits of the conditions tested to date, the results show that the similarity parameters needed for Appendix C scaling also can be used for SLD scaling, and no additional parameters are required. The material included applies only to unprotected, unswept geometries. Large feather growth issues, including scaling approaches, will be discussed briefly. Scaling results obtained by applying existing scaling methods for size and test- condition scaling will be reviewed. This paper has summarized recent NASA research into scaling of SLD conditions with data from both SLD and Appendix C tests. Ice Shape Scaling for Aircraft in SLD Conditions The modified French and AEDC methods produced scaled ice shapes which approximated the reference shapes when model size was reduced to half the reference size for the glaze-ice cases tested. Over this range, ice shapes produced using the Olsen method were unchanged. The Olsen method was tested with liquid-water content varying from 1.3 to. Reference and scale ice shapes were compared to evaluate each method. Icing tests were made with cylinders at both reference and scaled conditions representing mixed and glaze ice in the NASA Lewis Icing Research Tunnel. The other two methods discussed are: a modification of the French scaling law and the AEDC scaling method. ![]() It can be applied when full-size models are tested and all the desired test conditions except liquid-water content can be obtained in the facility. This report presents the results of tests at NASA Lewis to evaluate several methods to establish suitable alternative test conditions when the test facility limits the model size or operating conditions. Methods for Scaling Icing Test Conditions Using the theoretical Poiseuille and Nusselt numbers derived under the slip boundary condition at the solid–liquid interface, we estimate the slip length and thermal slip length at the interface. The forced convective heat transfer characteristics of single-phase laminar flow in a parallel-plate microchannel are investigated. We demonstrate that the deviation from classical theory with a reduction in hydraulic diameters is due to the breakdown of the continuum solid–liquid boundary condition. Here we show the scale effect of the boundary condition at the solid–liquid interface on single-phase convective heat transfer characteristics in microchannels. Given the larger surface/volume ratio of microchannel, the surface effects increase as channel scale decreases. However, the inconsistencies between experimental and classical theoretical predictions for the liquid flow in microchannel remain unclarified. Rapid advances in microelectromechanical systems have stimulated the development of compact devices, which require effective cooling technologies (e.g., microchannel cooling). Nagayama, Gyoko Matsumoto, Takenori Fukushima, Kohei Tsuruta, Takaharu Scale effect of slip boundary condition at solid–liquid interface An example designed by the optimum theory proves that the advanced tandem Wadsworth mounting performs excellently in spectral broadband. The spectral resolution has also been calculated by these conditions. These two arrangements comprise the advanced Wadsworth mounting condition. Then the optimum arrangement for the first plane grating and the second concave grating, which make the anterior Wadsworth condition fulfilling each wavelength, is analyzed by the geometric and first order differential calculation. The Wadsworth astigmatism-corrected mounting condition for which is expressed as the distance between the second concave grating and the imaging plane is calculated. An advanced tandem Wadsworth mounting has been investigated to deal with the situation. ![]() It may also introduce interference among the detector and the optical elements as it is applied to the short focal length and small- scale spectrometer in a close volume by satellite. When it is used to connect the off-axis telescope such as off-axis parabolic mirror, it presents lower imaging quality than to connect the coaxial telescope. The traditional tandem Wadsworth mounting is originally designed to match the coaxial telescope and large- scale imaging spectrometer. Tandem gratings of double-dispersion mount make it possible to design an imaging spectrometer for the weak light observation with high spatial resolution, high spectral resolution, and high optical transmission efficiency. Advanced astigmatism-corrected tandem Wadsworth mounting for small- scale spectral broadband imaging spectrometer.
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