Practical trainings, student assistants and theses

Development and experimental investigation of a multi-channel flow body sensor (Id 421)

Bachelor theses / Master theses / Diploma theses / Compulsory internship

The development of a multi-channel flow body sensor according to patent WO 2010/069307 A1 aims to quantify the gas content in flow-carrying components. A decisive advantage of this sensor lies in its optical measuring principle, which is based on fiber-optic coupling and the analysis of the light output signal. This avoids electrical potentials in the measuring area, offering significant advantages over electrical measuring methods (intrinsic safety), especially for explosive mixtures.

Preliminary tests at the Institute for Experimental Fluid Dynamics at the Helmholtz Center Dresden-Rossendorf on gas-liquid flows showed that a clear binarization of the sensor output signal can be achieved due to the capillary effects in narrow channels and the different refractive indices of the gas and liquid phases. Building on previous work with a single-channel sensor prototype based on a polymer optical fiber (POF) with a diameter of 1 mm, the following tasks must be completed as part of further research.

Tasks:

  • Adjusting the POF diameter to 1.5 mm in the single-channel configuration.
  • Conducting experimental investigations of the new single-channel prototype using the already developed test system and evaluation programs.
  • Designing a multi-channel sensor body for gas content measurements in the system.
  • Developing a transition adapter to optimize the flow distribution between the DN10 flow pipe and the sensor body.

Department: Fluid process engineering

Contact: Condriuc, Ivan, Dr. Kipping, Ragna

Requirements

  • Students majoring in fields such as process engineering, mechanical engineering, or chemical engineering.
  • Interest in fluid mechanics and the development of measurement technology.
  • Experience with 3D CAD tools.
  • Basic knowledge of Python programming

Conditions

Start date: 01.01.2025
Duration: according to the respective study regulations

Online application

Please apply online: english / german

Druckversion


Internship on experimental investigation of aerosol propagation (Id 381)

Student practical training / Compulsory internship / Volunteer internship

Background:

Currently, there is a broad discussion whether ventilation by frequent window opening is sufficient for providing a sufficient amount of fresh air or if technical air purification devices based on e.g. HEPA filters are better solutions for public spaces. Furthermore, there is another discussion ongoing, whether a well-guided laminar flow or a high degree of mixing within a room is more beneficial. The latter, on the one hand distributes the potentially virus-laden aerosols in the whole room, but on the other hand reduces the peak concentrations of these aerosols clouds by magnitudes.

Objectives:

The objective is to perform aerosol propagation experiments and to estimate the potential aerosol inhalation of people in dynamic situations. To achieve this, an aerosol generator will be used in a demonstrator room under different flow conditions. The data from different scenarios will be processed in order to obtain a transference function that can relate the aerosol source with the aerosol receivers.

Tasks:

  • Literature survey
  • Aerosol experiments in different scenarios.
  • Post-processing of the results.

Department: Experimental Thermal Fluid Dynamics

Requirements

  • Student of natural sciences or engineering
  • Willingness to conduct experimental work

Conditions

Duration:

4-6 months

Remuneration:

According to HDZR guidelines

Online application

Please apply online: english / german

Druckversion