跨聲速度 的英文怎麼說
中文拼音 [kuàshēngsùdù]
跨聲速度
英文
transonic speed-
Abstract : with an optical probe based on the principle of multi - wavelength light extinction, size and concentration of droplet were measured in a transonic wind tunnel. this paper presents the measurement results
文摘:應用基於多波長消光法原理發展的光學探針,測量了跨聲速風洞中不同馬赫數濕空氣流自發凝結形成的水滴尺寸及濃度,並給出了實驗結果。The comparison showed that : ( l ) farassat 1a formula is the simplest one and work well for the subsonic rotor. ( 2 ) both kirchhoff formula and k - fwh formula can predict the nonlinear noise generated by transonic rotor ; ( 3 ) when the surface is not positioned in the linear region, kirchhoff approach for rotating integration surface could lead to substantial error, but k - fwh formula can still work well
數值研究表明: farassat1a公式在預測線性噪聲方面簡單有效,適用於亞音速旋翼的噪聲預測; kirchhoff公式和k - fwh公式均能夠預測跨音速旋翼聲場,並且具有較高的精度;當聲源面位於流動非線性時, kirchhoff公式會導致很大的計算誤差,而k - fwh公式不存在這樣的問題。
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