The strength of high-duty gears can be improved by carburizing and quenching processes. Quenching distortion is inevitable during the process, and it has direct …
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Supplementary data are available at Bioinformatics online. Image-based correction of continuous and discontinuous non-planar axial distortion in serial section microscopy
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The traditional annulus casing treatment often pays the price of lowered efficiency for improving the stall margin of a compressor under inlet distortion. In view of the unsymmetry of the inlet flow-field of compressors, partial casing treatment was used to control the flow in a transonic axial-flow compressor with arc-skewed-slots deployed at …
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An automotive component (steering helical gear) made from low-alloy structural steel SCr420H was gas-carburized and oil-quenched. Axial contraction of total length was measured after such case-hardening process. Using DEFORM-HT Ver 6.1 simulation tool incorporating phase transformation kinetics, the causal factor of negative …
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Although we have looked at a distortion via elongation of the axial pair of ligands, we could also get a complementary case in which the octahedron is compressed along one axis and stretched along the equatorial plane.
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A Numerical Investigation on the Volute/Diffuser Interaction Due to the Axial Distortion at the Impeller Exit Fahua Gu, Fahua Gu Turbomachinery Lab, Michigan State University, East Lansing, MI 48824. Search for other works by this author on: This Site. PubMed. Google Scholar.
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Based on the batch simulation results, it is found that the axial springback and cross section distortion are primarily controlled by total stretch, bending angle and pre …
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ダイネーゼのレースおよびスポーツブーツはAxial Distortion Control Systemをすることによって、をちながらもジョイントをつというなをました。
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The von mises stress theory for failure also known as the maximum distortion energy theory which is developed by M.T. Huber and R.Von mises.
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The Jahn–Teller distortion, describes the geometrical distortion of molecules and ions that result from certain electron configurations. [2] This distortion is normally observed among octahedral complexes where the two axial bonds can be compressed or elongated to result in a different bond length from those of the equatorial bonds as shown ...
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Distortion, such as total pressure distortion, is a common phenomenon at the inlet of an axial compressor. Nonuniform inflow can greatly affect the aerodynamic performance and the stability of the compressor. In this paper, a sinusoidal distortion model is used at the inlet. Then, a series of unsteady computational fluid dynamics …
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When the three-dimensional (3D) image is out of focus, a significant axial squeeze distortion is generally produced by position mismatching between th…
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In this paper, the influence of nonuniform bleed extraction on the stability of an axial flow compressor is quantified. Nonuniformity can be caused by several geometric factors (for example, plenum chamber size or number of off-take ducts), and a range of configurations is examined experimentally in a single stage compressor. It is shown that …
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At the same time, the Cu K-edge XANES spectrum in CuWO 4 differs from the spectra in the MET and the HET, evidencing different distortions of [CuO 6] octahedra because of the reduction of the JT axial distortion as shown by our RMC analysis (Fig. 5).
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A stability model for axial compressors with inlet circumferential distortion is proposed in the present work. Based on the small perturbation theory, the compressor is divided into several inter-blade volumes containing two-dimensional primary flows.
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Design of Sinusoidal Leading Edge for Low-Speed Axial Fans Operating under Inflow Distortion . by Lorenzo Tieghi. Lorenzo Tieghi. SciProfiles Scilit Preprints Google Scholar 1,*, Giovanni Delibra. Giovanni Delibra. SciProfiles Scilit Preprints ...
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In this paper, the single-stage compressor with circumferential non-uniform tip clearance is experimentally investigated under 180° total pressure distortion for the compressor characteristics and the dynamic stall process.
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Based on a small perturbation stability model for periodic flow, the effects of inlet total temperature ramp distortion on the axial compressor are investigated and the compressor stability is quantitatively evaluated. In the beginning, a small perturbation stability model for the periodic flow in compressors is proposed, referring to the …
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As expected, non-planar axial distortion correction considerably decreased the distortion of the series in both experiments. 5 Discussion We developed novel …
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martensite as well as retained austenite in contributing the axial contraction of total length. Finally, transformation plasticity has a greater influence than volume fraction of martensite and retained austenite in producing the negative axial distortion. Keywords case hardening, computer simulation, distortion, heli-
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Typical distortion patterns for the inlet-compressor interaction are shown and explained in Fig. 3. In terms of axial compressors, especially in distortion conditions, studies related to tip clearances, stall mechanisms, stall warning, stall margin enhancement, and unsteady rotor-stator interaction have also been of great concern.
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Figure 15a: Advanced fibrotic sarcoidosis. (a–c) Axial inspiratory CT and (d) coronal inspiratory CT images demonstrate mid to upper lung–predominant pulmonary …
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This paper considers effects of Rotating Inlet Distortion (RID) on a two-stage axial compressor and the stabilization effects of a casing treatment subjected to the considered RID.
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The BLI inlet distortion induces non-uniform whirl and axial velocities at the rotor outlet, leading to a circumferential and radial non-uniform incidence distribution for the downstream stator. One of the main challenges for the compressor performance is a bad match between the rotor outflow and the stator inlet geometry, which would cause ...
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To deeply understand the negative impact of circumferential inlet distortion on the internal flow of the compressor, by using the unsteady force testing technique of a rotor blade surface under a rotating coordinate system, the pressure fluctuations on the rotor blade surface are successfully captured when the rotor blade rotates through the …
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The performance and stability of the transonic fan stage with a nonuniform inflow is a key issue in aero engine operation, and the coupling of inlet distortion and low Reynolds numbers at high altitude creates more severe challenges to aero engines. This work used computational methods to explore the performance and stability of a …
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As expected, non-planar axial distortion correction considerably decreased the distortion of the series in both experiments. 5 Discussion. We developed novel methods to address two previously unsolved problems: (1) establish the correct order of unordered section series and (2) compensate for planar and non-planar axial distortion.
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axial distortion estimates are not based on pairs of sections only, thus improving global consistency across the image se-ries. Furthermore, varying imaging or tissue properties can be captured by local estimates of the reference signal along the axis of distortion. 3. METHOD In the following, we describe our image-based methods for
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This paper applies a computational method to investigate the coupling effects of total pressure distortion and low Reynolds number on an axial transonic compressor. The study was carried out on NASA stage 67, in which extensive open experimental data is available.
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In this study, the influencing factors on distortion and cutting force in axial ultrasonic-assisted milling were discussed, and the outputs were compared with conventional milling.
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This paper applies a numerical approach to improve the understanding of reaction to various inflow conditions for the compressor system and the mechanism of stall inception under rotating inflow distortions. Full annulus, unsteady, three-dimensional computational fluid dynamics has been used to simulate an axial low-speed compressor …
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