Variability of Focused Sonic Booms from Accelerating Supersonic Aircraft in Consideration of Meteorological Effects.
Variability of Focused Sonic Booms from Accelerating Supersonic Aircraft in Consideration of Meteorological Effects.
复制标题
考虑气象影响的超音速飞机加速时聚焦音爆的变化性。
DOI：
10.1121/1.1938547
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发表时间：
2005
影响因子：
2.4
通讯作者：
D. Heimann
中科院分区：
文献类型：
--
作者：
R. Blumrich;F. Coulouvrat;D. Heimann
导出了非定常加速超音速飞行引起的聚焦音爆特性的气象变异统计。采用先进的音爆软件进行了仿真，其中包括非线性Tricomi方程的数值求解器，该方程模拟了焦散周围的聚焦声压场。北大西洋飞行走廊沿线一年的每日气象数据被用作输入。统计数据包括假设从巴黎到纽约往返的超音速商业运输航班的地面焦散的位置、强度和几何扩展。焦散只发生在从巴黎飞往纽约的航班在英吉利海峡上空的加速阶段，而不会发生在返程航班的减速阶段。在相似条件下，最大聚焦超压的平均值约为2马赫巡航飞行最大超压的4倍，但变异性较大。焦散强烈……
Statistics of the meteorologically induced variability of focused sonic boom characteristics due to unsteady, accelerated supersonic flights were derived. The simulations were performed with an advanced sonic boom software including a numerical solver of the Nonlinear Tricomi Equation modeling the focused sound pressure field around caustics. A one-year set of daily meteorological data along the Northern Atlantic flight corridor was used as input. The statistics comprise the location, strength and geometrical extension of caustics at ground level for assumed flights of a supersonic commercial transport from Paris to New York and back. Caustics only occurred during the acceleration phase above the English Channel for flights from Paris to New York, never during the deceleration phase of return flights. The mean value of the maximum focused overpressure is found to be about 4 times the maximum overpressure for cruise flight at Mach 2 in similar conditions, but shows a large variability. The caustics interse...