| 1. | Both types of tests have been explored in wind tunnels .
这两种形式的试验都已在风洞中进行过探索。 |
| 2. | It is not correct to think of the wind tunnel having uniform flow .
设想风洞具有均匀的气流是不正确的。 |
| 3. | Setting very low speeds in a wind tunnel is always a vexatious problem .
在风洞中调出低风速来始终是一个麻烦问题。 |
| 4. | It should be noted that a balance is not always required in a wind tunnel .
应该指出，天平对风洞来说并非是绝对必须的。 |
| 5. | The experiments were conducted in a wind tunnel at a location 50 ft downwind from the fan .
实验是在风洞中距离风机50英尺处进行。 |
| 6. | Hypersonic wind tunnels operating at very low densities were developed starting in about 1960 .
低密度超音速风洞大约开始发展于1960年。 |
| 7. | The damping derivatives can only be determined experimentally in the wind tunnel or ballistic range .
阻尼导数只能用风洞或弹道试验来确定。 |
| 8. | A second method of measuring the turbulence in a wind tunnel makes use of a "pressure sphere. "
测量风洞紊流度的第二个方法是使用“压力球。” |
| 9. | Any flight test and wind tunnel correlation always suffers from a great number of unknowns .
在对飞行试验与风洞试验进行比较时总有大量的未知数。 |
| 10. | Very early in the century experimenters using open-throat wind tunnels found their tunnels giving very pessimistic results .
在本世纪初期，实验工作者发现用开口风洞得出的结果偏于保守。 |
