Simulation methodology development for rotating blade containment analysis |
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Authors: | Qing He Hai-jun Xuan Lian-fang Liao Wei-rong Hong and Rong-ren Wu |
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Institution: | [1]High-Speed Rotating Machinery Laboratory, Institute of Chemical Machinery, Zhejiang University, Hangzhou 310027, China [2]Department of Automation, Zhejiang University, Hangzhou 310027, China |
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Abstract: | An experimental and numerical investigation on the aeroengine blade/case containment analysis is presented. Blade out containment
capability analysis is an essential step in the new aeroengine design, but containment tests are time-consuming and incur
significant costs; thus, developing a short-period and low-cost numerical method is warranted. Using explicit nonlinear dynamic
finite element analysis software, the present study numerically investigated the high-speed impact process for simulated blade
containment tests which were carried out on high-speed spin testing facility. A number of simulations were conducted using
finite element models with different mesh sizes and different values of both the contact penalty factor and the friction coefficient.
Detailed comparisons between the experimental and numerical results reveal that the mesh size and the friction coefficient
have a considerable impact on the results produced. It is shown that a finer mesh will predict lower containment capability
of the case, which is closer to the test data. A larger value of the friction coefficient also predicts lower containment
capability. However, the contact penalty factor has little effect on the simulation results if it is large enough to avoid
false penetration. |
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