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瘤状冰结冰过程的数值模拟 被引量:24
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作者 陈维建 张大林 《航空动力学报》 EI CAS CSCD 北大核心 2005年第3期472-476,共5页
提出了一种可考虑粗糙度影响的瘤状冰结冰过程数值模拟方法。结合欧拉坐标系下空气-过冷水滴两相流动控制方程的计算,对飞机机翼在不同温度下的瘤状冰结冰过程进行了数值模拟,得到了NACA0012翼型4°攻角下结冰表面的瘤状冰冰形。通... 提出了一种可考虑粗糙度影响的瘤状冰结冰过程数值模拟方法。结合欧拉坐标系下空气-过冷水滴两相流动控制方程的计算,对飞机机翼在不同温度下的瘤状冰结冰过程进行了数值模拟,得到了NACA0012翼型4°攻角下结冰表面的瘤状冰冰形。通过与实验数据对比,表明该的方法是有效的。 展开更多
关键词 航空、航天推进系统 数值模拟 防、除 瘤状冰
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飞机机翼结冰过程的数值模拟 被引量:25
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作者 陈维建 张大林 《航空动力学报》 EI CAS CSCD 北大核心 2005年第6期1010-1017,共8页
提出了一种适用于各种结冰气象条件下飞机机翼结冰过程的数值模拟方法。结合欧拉坐标系下空气-过冷水滴两相流动控制方程的计算,对不同气象条件下飞机机翼的结冰过程进行了数值模拟,得到了4°攻角NACA 0012翼型表面霜状冰、混合冰... 提出了一种适用于各种结冰气象条件下飞机机翼结冰过程的数值模拟方法。结合欧拉坐标系下空气-过冷水滴两相流动控制方程的计算,对不同气象条件下飞机机翼的结冰过程进行了数值模拟,得到了4°攻角NACA 0012翼型表面霜状冰、混合冰及瘤状冰3种冰形。所得冰形与文献中的试验数据和计算结果吻合良好,表明本文方法有效。另外还计算了不同的冰形对机翼升、阻力的影响,结果表明瘤状冰对机翼气动特性的影响最大。 展开更多
关键词 航空 航天推进系统 数值模拟 防、除 混合 瘤状冰
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Minimally invasive video-assisted thyroidectomy for thyroid adenoma 被引量:1
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作者 Guangquan Zong Xushun Liu Feng Wang 《The Chinese-German Journal of Clinical Oncology》 CAS 2009年第8期460-462,共3页
Objective: The aim of the study was to investigate the value of minimally invasive video-assisted thyroidectomy for thyroid benign adenoma. Methods: From June 2003 to June 2007, 128 cases of thyroid tumors, includin... Objective: The aim of the study was to investigate the value of minimally invasive video-assisted thyroidectomy for thyroid benign adenoma. Methods: From June 2003 to June 2007, 128 cases of thyroid tumors, including 123 cases of adenoma and 5 cases of carcinoma, were performed by Miccoli's endoscopic thyroidectomy. The surgical techniques and the clinical outcomes with respect to pathologic results, duration of operation, postoperative drainage, pain, cosmetic results and complications of endoscopic thyroid surgery via the neck approach were retrospectively summarized. Results: NI the patients underwent minimally invasive endoscope-assisted thyroidectomy successfully. Five cases of carcinoma revealed by frozen section. In which, 3 papillary carcinoma cases underwent subtotal thyroidectomy of disease-side in video-assisting, whereas the other 2 cases with follicular and medullary carcinoma underwent conventional total thyroidectomy of disease-side combined with subtotal thyroidectomy of the opposite-side. The transient hoarseness occurred in one patient and recovered well one week later, and the other patients recovered successfully without any complications. Conclusion: Minimally invasive video-assisted thyroidectomy for thyroid adenoma is safe and reliable. This procedure offers a shorter incision, less invasion and better cosmetic results as compared with conventional thyroidectomy. 展开更多
关键词 ENDOSCOPY THYROIDECTOMY thyroid adenoma
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