This study conducted the experimental investigation of aerodynamic heating of Micro-scale Rotational Shearing Flow with Axial Limited-Length（MRSFALL）. The temperature riseof the stator is captured by the high respon...
This study conducted the experimental investigation of aerodynamic heating of Micro-scale Rotational Shearing Flow with Axial Limited-Length（MRSFALL）. The temperature riseof the stator is captured by the high response thermocouples. The eccentricity ratio and clearanceheight are guaranteed by means of instantaneous trajectory and torsion monitoring of the *** result shows that the maximum temperature rise takes place upstream of the minimum clear-ance height along circumferential direction. The distribution of temperature rise presents asymmet-ric curve along axial direction, and peak value occurs near the dimensionless axial position of-0.18. The effect of aerodynamic heating becomes notable as the rotational speed is larger than3 × 10～4r/min. The effect of end leakage and the viscous dissipation have great impact on temper-ature rise of MRSFALL. More specially, the peak value of temperature rise at dimensionless clear-ance height of 0.008 0 is larger than the case at dimensionless clearance height of 0.004 ***, when the eccentricity ratio is too large, the viscous dissipation is induced, and theadditional temperature rise is achieved. The heat flux identification of shear flow has been realizedby Sequential Function Specification Method（SFSM） and its estimation of thermal load has been given. The heat flux induced by the aerodynamic heating in this study varies from 950 W/m2to1 330 W/m2.
The hydrogen ions in the superionic ice can move freely, playing the role of electrons in metals. Its electromagnetic behavior is the key to explaining the anomalous magnetic fields of Uranus and Neptune. Based on the...
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In this paper a low cost pupil center locating system was introduced and target maneuver onset detection algorithm, input estimation based Gaussian significance test, was applied to estimate pupil center. Firstly, eye...
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ISBN:
(纸本)9781849195386
In this paper a low cost pupil center locating system was introduced and target maneuver onset detection algorithm, input estimation based Gaussian significance test, was applied to estimate pupil center. Firstly, eye images were converted into Gaussian significance space of input estimate. In statistical significance space, pupil area was enhanced while other area was depressed. Secondly, threshold selected by input estimation based Gaussian significance test algorithm was used to binarize image in the space of statistical significance. At last pupil center was obtained by calculating mass center of the binarized image. Experiments showed that the proposed method was effective.
For existing image-guided radiation therapy systems (IGRT), the limited angular range of the cone-beam computed tomography (CBCT) scanning improves the compactness of the system and compatibility between CBCT and line...
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Remote object contours abstracted from image sequence obtained by space optical sensor were often tiny and inclined to be stained by noise. It would deteriorate the results of most contour based algorithms. In order t...
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ISBN:
(纸本)9781849195386
Remote object contours abstracted from image sequence obtained by space optical sensor were often tiny and inclined to be stained by noise. It would deteriorate the results of most contour based algorithms. In order to solve the problem a fast and robust noise reduction technique for tiny contour in image sequence was presented in this paper. In the proposed technique, every contour in the sequence were described in frequency domain by the Fourier Descriptors (FD's). And then, a set of Kalman filters were used to filter the noise in every frequency point of the contours FD's. The contour after noise reduction was retrieved by inverting the filtered contour FD's. The experimental results showed the proposed method was useful and effective.
The information interaction in the formation tasks has higher and higher requirements on the timeliness of the communication system, but the electromagnetic environment in the confrontation environment is extremely un...
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Icebergs threaten the navigation safety of ships in the Arctic, small icebergs are difficult to detect in harsh sea conditions. Timely detection of these targets is crucial for aiding ships in navigational decisions. ...
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The halide perovskite CsPbBr3 quantum dots (QDs) exhibit remarkable potential for diverse applications, attributed to their distinctive optical properties. However, their poor stability hinders practical implementatio...
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Ensuring end-to-end cross-layer communication security in military networks by selecting covert schemes between nodes is a key solution for military communication security. With the development of communication techno...
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