of Jet (m虏)...4Mass flow rate of Water (kg/s)...
Sand and/or water/jet impact and underwater tests like immersion in ultrasonic bath and rotary slurry are also good techniques to evaluate the stability of the surfaces for outdoor applications. Table 2 gives a summary of the tests that are more suitable for such outdoor applications. A third...
1)impact experiment碰撞实验 1.Animpact experimenton air tracker can reduce the force of friction influence.在气垫导轨上做碰撞实验,最大限度地减少了摩擦阻力的影响,但在实际的实验过程中,仍发现滑块的初速度不同时,粘滞性摩擦阻力对测量结果有不同程度的影响,为此在气垫导轨上增加了电子发射装置,较好地控制滑...
the catalogue of near-Earth asteroids is incomplete for objects whose impacts would produce regional devastation1,2. Several approaches have been proposed to potentially prevent an asteroid impact with Earth by deflecting or disrupting an asteroid1,2,3. A test of kinetic impact technology was identif...
The velocity of the jet can be up to 40 times larger than the impact speed, a behaviour that the authors trace back to the formation (and subsequent collapse) of an air cavity inside the drop. In a separate effort, Mathilde Reyssat et al. take a close look at drops falling onto a ...
In order to clarify the mechanism of the collapse and induced impact wall-pressure generation of a single spark-generated bubble, a detailed experiment was conducted by means of high-speed photography and pressure measurement. By changing the ratio of the distance between the electrodes and the sol...
"Perhaps somewhere between four and eight weeks, as best we can can predict, we expect the lander to not have enough power to operate any longer, and we will lose contact with the spacecraft," said Bruce Banerdt, InSight principal investigator for NASA's Jet Propulsion Laboratory. ...
In this case the effect of the distance between two opposed nozzles was examined. For a lab-scaled fluidized bed opposed jet mill the effects of gas pressure and hold-up were investigated. Relative particle velocities were found to be significantly lower than the gas velocities, while the ...
Bright radar reflections observed in the Ultimi Scopuli region of Mars’ south polar layered deposits1–3 by the Mars Advanced Radar for Subsurface and Ionosphere Sounding instrument have been interpreted as the signature of areas of subglacial water ben
Hypervelocity Liquid JetPowder GunImpactWe generated pulsed hypervelocity liquid jets to about 5 km/s using a powder gun and carried out an experimental program of perforation of metal plates by the impact of the jets. The gun has a 15 mm bore diameter. The jets were generated by using a ...