However, the flight still managed to return 139 seconds of aerodynamic data at a velocity between 17 and 22 times the speed of sound, Darpa said.
然而，Darpa表示，在以17到22倍音速飞行的状态下，飞机还是回传了139秒的空气动力学数据。
Flow velocity, at this location, can never exceed the local speed of sound, and is said to be in a choked condition.
流速，在这个位置，绝不能超过当地音速的，据说是在一个呛条件。
Both the velocity of the sound-excited jet flow at a small circular orifice and the nonlinear impedance of the orifice are measured at high sound intensity.
在高声强下测量了微圆孔处声激发射流的速度和微圆孔的非线性声阻抗。
An acoustic transducer system for use in the measurement of longitudinal sound velocity in a cement sample that is maintained at high temperature and pressure.
一种用于测量保存在高温高压下的水泥样品中的纵向声速的声换能器系统。
The minimum fluidization velocity has a minimum value when the frequency of sound waves approached 150 Hz, whereas it decreased as the sound pressure level was increased at the same sound frequency.
气泡尺寸和鼓泡频率随声压的增大而减小，随声波频率的增大先减小后增大。
The sound pressure level at certain distance from the outer shell in flow field is obtained when the vibration velocity of the inner shell is known.
在已知内层壳体振动速度的情况下，计算出流场中距外层壳体一定距离处的声压级。
Deflagration is combustion wave propagating at a velocity less than the speed of sound.
爆燃过程是一种以低于音速而传播的燃烧波。
Deflagration is combustion wave propagating at a velocity less than the speed of sound.
爆燃过程是一种以低于音速而传播的燃烧波。
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