Inertial levitation
نویسندگان
چکیده
We consider the steady levitation of a rigid plate on a thin air cushion with prescribed injection velocity. This injection velocity is assumed to be much larger than that in a conventional Prandtl boundary layer, so that inertial effects dominate. After applying the classical ‘blowhard’ theory of Cole & Aroesty (1968) to the two-dimensional version of the problem, it is shown that in three dimensions the flow may be foliated into streamline surfaces using Lagrangian variables. An example is given of how this may be exploited to solve the three-dimensional problem when the injection pressure distribution is known.
منابع مشابه
Using magnetic levitation to produce cryogenic targets for inertial fusion energy: experiment and theory
We present experimental and theoretical studies of magnetic levitation of hydrogen gas bubble surrounded by liquid hydrogen confined in a semi-transparent spherical shell of 3 mm internal diameter. Such shells are used as targets for the Inertial Confinement Fusion (ICF), for which a homogeneous (within a few per-cent) layer of a hydrogen isotope should be deposited on the internal walls of the...
متن کاملAsymptotic solution of ultrasonic near-field levitation problem
Ultrasonic near-field levitation allows suspension of a moderately large object at a height of tens of microns above sound actuator. We developed an asymptotic approach to describe the air dynamics in the gap between an acoustic source and the levitating object. The suggested method allows computation of the lifting force. Due to resolving of both viscous and inertial effects, it remains applic...
متن کاملTuned Parameters of PID for Optimization of Losses in Magnetic Levitation System
In this paper a new method is proposed for determining PID controller parameters in order to decrease losses in levitation system of magnetic trains. It is assumed that this system is a hybrid system and it consists of electric and permanent magnet. For optimization of losses initially AC losses of magnetic levitation system are calculated. Linear model of levitation system as well as modeling ...
متن کاملDynamic Error Correction of Force Sensor
The author has proposed a method, the Levitation Mass Method (LMM). In the LMM, the inertial force of a mass levitated using a pneumatic linear bearing is used as the reference force applied to the objects under test, such as force sensors, materials or structures. The inertial force of the levitated mass is measured using an optical interferometer. The author has modified it as calibration met...
متن کاملMicromachined Inertial Sensors State of the Art and a Look into the Future
In the paper a review is given of the current state of the art of micromachined inertial sensors accelerometers and gyroscopes. These sensors can be used in a wide range of applications and micromachined devices have a number of significant advantages over their conventional counterparts such as lower cost, smaller form factor and lower power consumption. An overview will be given over the dive...
متن کامل