Có 66+ tài liệu thuộc chủ đề "Sản xuất động cơ"
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Figure G.22. Figure G.23. The microstructural changes, aside from the scale of damage, were consistent for all specimens. Figure G.24. As can be seen from Figure G.24, their orientation is such that they could increase the susceptibility to fatigue crack growth.. Figure G.25 is a back-scattered electron image showing an area of the edge of a V-notch produced by firing...
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0.22 mm 0.96 mm. 0.40 mm 0.18 mm. 1.00 mm 0.33 mm. 0.36 mm 0.12 mm. 0.27 mm 0.39 mm. Figure G.34. The failure of the fine mesh to better predict material failure indicates that advanced codes such as hydrocodes and Particle-In-Cell (PIC) methods require significant expertise in order to be used correctly. In this case, the poor predictions may...
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residual stresses assumed present in ballistic and solenoid simulated FOD with compressive zone of 0.004 inches. First, assume an FOD event has occurred on the leading edge of a blade resulting in a notch with a depth of 0.3 mm (0.012 in). The notch has a root radius of 0.06 mm (0.0024 in.) and does not have a crack emanating...
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Blades insufficiently designed for FOD considerations have caused In-Flight Shut Downs (IFSDs) and costly damage to the engine. FOD tolerance can be enhanced by use of more damage tolerant materials and a redistribution of the blade mass.. The requirements of 3.3.2.2 shall be verified by:. “Simulated foreign object damage shall be applied to the (a) critical stage blades at one...
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Following the post-test performance check, the engine shall be disassembled to determine the extent of sand erosion, and the degree to which sand may have entered critical areas in the engine.. The recommended text decreases the operational time in the extreme sand and dust environment from ten hours to two hours for turbofan and turbojet engines. Engine contractors have been...
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Mô phỏng nâng cao tính năng làm việc cho động cơ diesel 1 xi-lanh bằng thiết kế cải tiến họng nạp. PTN Trọng điểm ĐHQG-HCM Động cơ đốt trong, Trường ĐH Bách Khoa, ĐHQG-HCM. Bài báo này trình bày nghiên cứu cải tiến họng nạp cho động cơ diesel 1 xi-lanh RV165-2 nhằm tăng hiệu suất nạp và nâng cao...