Aerosol and Spray Technology Group

The research team, led by prof. Jan Jedelský, works on experimental fluid mechanics and is mainly focused on the research, development and testing of different types of spray nozzles.

Typical applications of the research are made to the design and diagnostics of atomisation nozzles for the automotive industry, turbine engine combustion chambers, the combustion of waste fuels, and also for the pharmaceutical industry (nebulizers, inhalers), or the issue of air flow.

The team’s activities include:

– research, development and testing of various types of spray nozzles, injectors and nebulizers
– the design of pressure and twin-fluid nozzles using in-house methodologies, design of nozzles for highly viscous liquids, waste fuels and suspensions with solid particles
– measuring the properties of sprays using advanced laser diagnostic methods as input data for computer (CFD) models
– visualization of the internal flow in nozzles and research of two-phase flow
– calculation of the two-phase liquid-gas discharge with in-house software
– assess the stability of sprays using published and custom methods

However, the emphasis is on experimental work using optical methods and computational support. With industry-leading instrumentation laboratories it is possible to measure a wide range of properties of atomised liquids. The research team has also developed several unique programs and software, which are now used by researchers from other institutions.
Research results allow for the design and construction of spray nozzles that meet the demanding requirements of the industry and users, whilst also considering the effectiveness of specific requirements and environmental friendliness.

The research team within one of the projects is focused on the modification of the nozzles for alternative fuels in combustion turbines. In addition, the team focuses on the spreading of waste substances, such as those made from cooking oil, for example.

In the field of aerosols research the team is dedicated to the experimental study of transportation and deposition. Research activities are currently focused, for example, on clarifying the transport of different types of particles and evaluating the effectiveness of their establishment when inhaled into human lungs. For this purpose, a unique realistic model of the human respiratory tract is used, which was developed by a research team in 2014. Using an experimental approach, it is possible to use this new model to gain a unique understanding of the transport and deposition of particles in individual segments of the lungs. The model has great potential for use in a wide range of applicable areas, particularly in the healthcare industry and in education.

The final area in which the research team are dedicated, is ventilation systems. The team focuses on a broad spectrum of problems related to air flow, either in rooms or in the cabins of vehicles. For this study are used advanced optical diagnostic methods for visualization and results processing which serves a number of programs, some of which were developed by the research team.

Researchers in all areas maintain long-term cooperation with leading Czech industrial companies, including Skoda Auto, PBS, Honeywell and Evektor.

Contact person
doc. Ing. Jan Jedelský, Ph.D.

Research carried out at the Energy Institute

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