Experience in High– Voltage Technology with over 15 Patents Registered
Antrova is a independent innovation and development company located in Schaffhausen Switzerland. Over the last 15 years, Antrova has acquired a deep knowledge in dimensioning and construction of high current and high voltage components and facilities.
Antrova offers: - engineers PHD/ Master/ Bachelor, technical designer, business economist MBA - own simulation capabilities (grounding , field distribution, current distribution, dielectric, cooling , CFD and FEM ) Experience in: - nominal voltage up to 800kV - nominal current up to 30kA - work on-site and project work - system parts certified by SVTI (Swiss association for technical inspection)
Pressure wave superchargers (Figure 1) use pressure waves of the exhaust gases to compress fresh air in the cells of the rotor. The rotor turns, driven by electric motor, so this process can be synchronized. Due to the principle that exhaust gases are compressing fresh air in direct contact, the rotor speed can also be used to control exhaust gas recirculation. In engines working at λ=1 principle the three-way-catalyst needs to be located before boosting device, which can have a positive impact on its performance, for example during cold start.
EVOLUTION of the Pressure Wave Supercharger Concept
Abstract. Born more than a century ago, the concept of exploiting the pressure wave phenomenon has evolved with rather small steps, experiencing an accelerated progress over the past decades. This paper aims an overview on the researchers’ results over time regarding the pressure wave technology and its applications, pointing out on the internal combustion engine’s supercharging application. This review complements the past reports on the subject, presenting the evolution of the concept and technology, as well as the researcher’s efforts on solving the specific shortcomings of this pressure wave technology. Undoubtedly, the pressure wave rotors have been a research goal over the years. At first, most of the researches were experimental and the theoretical calculations required to improve the technology were too arduous. Recently, new computer software dedicated to accurate simulation of the processes governing the wave rotor operation, altogether with modern experimental measurement nstruments and well-developed diagnostic techniques have opened wide possibilities to innovate the pressure wave supercharging technology. This paper also highlights the challenges that specialists still have to overcome and aspects to become future preoccupations and research directions.
To cite this article: Iuliana Costiuc and Anghel Chiru 2017 IOP Conf. Ser.: Mater. Sci. Eng. 252 012081
DESIGN AND SIMULATION OF A PRESSURE WAVE SUPERCHARGER FOR A SMALL TWO-STROKE ENGINE
As small, Remotely Piloted Aircraft become more prevalent as aerial observation platforms in the modern era, there will continue to be a desire to improve their capabilities. The lowered pressures associated with high altitude have an adverse impact on the performance of the small engines that are commonly used to propel small aircraft. The most desirable method of recovering the performance lost as a result of engine operation at high altitude is the integration of a forced induction device. Due to its unique characteristics, a special type of wave rotor called a Pressure Wave Supercharger has the potential to avoid many scaling-related losses, allowing it to operate efficiently as a forced induction device for small engines. This thesis outlines the successful design and computational simulations performed in the development of a Pressure Wave Supercharger for a 95 cc Brison engine. A NASA quasi one-dimensional CFD code was used to produce computational predictions for the performance of a Comprex® Pressure Wave Supercharger and compare these predictions against the measured performance. This code was then used to design a scaled down Pressure Wave Supercharger for use on the 95 cc Brison. This design was modeled using Computer Aided Design and the parts were manufactured. A test rig was also designed for the purpose of testing the scaled Pressure Wave Supercharger. This device will improve the performance of small two-stroke engines flying at high altitudes by boosting the intake manifold pressure to one standard atmosphere or better. This will allow small unmanned aerial systems operated by the Air Force to function at higher altitudes, thus improving their capabilities and mission effectiveness.
A Review of Wave Rotor Technology and Its Applications
The objective of this paper is to provide a succinct review of past and current research in developing wave rotor technology. This technology has shown unique capabilities to enhance the performance and operating characteristics of a variety of engines and ma- chinery utilizing thermodynamic cycles. Although there have been a variety of applica- tions in the past, this technology is not yet widely used and is barely known to engineers. Here, an attempt is made to summarize both the previously reported work in the literature and ongoing efforts around the world. The paper covers a wide range of wave rotor applications including the early attempts to use wave rotors, its successful commercial- ization as superchargers for car engines, research on gas turbine topping, and other developments. The review also pays close attention to more recent efforts: utilization of such devices in pressure-gain combustors, ultra-micro gas turbines, and water refrigera- tion systems, highlighting possible further efforts on this topic. Observations and lessons learnt from experimental studies, numerical simulations, analytical approaches, and other design and analysis tools are presented. DOI: 10.1115/1.2204628
Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indianapolis, IN 46202-5132
The Comprex....A New Concept of Diesel Supercharging
The Comprex supercharger compresses air by direct transmission of energy from an expanding gas tilizing compression and expansion waves. The name Comprex is a contraction of Compression-Expander. Although the phenomena of nonsteady flow have been studied extensively in connection with explosions, diesel fuel injection, railway airbrakes, water hammer, safety equipment in hydraulic power stations, and so on, the use of these effects in gases is relatively new. This paper deals with the Comprex as applied to supercharging of internal-combustion engines. It explains the principle of operation, describes the design and discusses the particular operational characteristics as a supercharger for a 4-cycle diesel engine. It should be remembered that this is only one of many applications of a broad and unexploited field.
Contributed by the Gas Turbine Power Division for presentation at the Gas Turbine Power Conference and Exhibit, Washington, D. C., March 2-6, 1958, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. (Manuscript received at ASME Headquarters, January 16, 1958.)