有效翼展 的英文怎麼說
中文拼音 [yǒuxiàoyìzhǎn]
有效翼展
英文
effective span-
In order to imitate tune tail fin better, a flexible fin only in chordwise is considered. results shows that flexibility can increase the propulsive efficiency and cause small decreases in the average thrust compared with a rigid caudal fin with similar motion. next, a comparison between the rectangle fin and the lunate fin is given
為了使數學模型更貼近生物模型，本文又將尾鰭處理為只考慮弦向變形而不考慮展向變形的柔性體，兩者對比的結果表明，柔性翼使得平均推力減小，但是，對具有相同推力的柔性翼比剛性翼具有更高的效率。The numerical algorithm of solving the adjoint equations for different design cases have been developed by using finite volume methodology which is usually used to solve the flow governed equation. it includes the some important aspects, such as flux formulation, wall and far - field boundary treatment methodology, dissipative term formulation, etc. after the solution of the adjoint equations is obtained, the derivatives of the cost function with respect to all the design variables can be evaluated with the same operation. this can yields a significant saving over the other gradient - based techniques when there are many design variables
（ 3 ）進行了應用控制理論和三維歐拉方程的機翼氣動反設計研究，以及有升力約束情形下機翼跨音速減阻問題研究，分別推導了相應的共軛方程及邊界條件數學表達形式，研究與發展了三維共軛方程的有限體積數值求解方法，及相應梯度公式的數值求解方法，通過對計算網格生成、流場計算、共軛方程數值求解、梯度求解和優化演算法等多方面的有效結合，成功發展了三維機翼的氣動反設計和跨音速減阻優化設計程序，成功地進行了多個設計算例研究。At the base of getting a great deal of structure corrode damage data and through statistic fitting method, discovered the rule between outboard wing corroded depth and lifespan at different airport. then we can calculate the inoxidizing coating lifespan, basal body corroding expansion lifespan and first repair time
在獲得使用中結構腐蝕損傷的大量數據的基礎上，通過統計擬合的方法，取得不同機場飛機外翼長桁腐蝕深度與日歷壽命的統計規律的基礎上，進而可以求得防護層的有效壽命、基體腐蝕擴展壽命。For unsteady - state calculations, jameson ' s dual - time method is used. to confirm the validity, effectivity and reliability of developed flow solvers based on ausm + scheme, test cases of steady / unsteady transonic flow of naca0012 airfoil and onera m6 wings are investigated first
本文首先以naca0012翼型、 oneram6機翼為算例，驗證了本文發展的基於ausm +格式的跨音速定常、非定常navier - stokes euler方程解算器是正確、有效和可靠的。Therefore the fuzzy control with self - tuning algorithm developed here can be regarded as an efficient tool for analyzing the performance of control fins of the swath ship in irregular waves
因此，本文所發展之自調式模糊控制邏輯，可視為小水面雙體船控制翼在不規則波中操控運動性能的一項有效分析工具。分享友人