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Article
DDT and detonation waves in dust-air mixtures
This paper summarizes the studies of DDT and stable detonation waves in dust-air mixtures at the Stosswellenlabor of RWTH Aachen. The DDT process and propagation mechanism for stable heterogeneous dust detona...
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Article
Detonation formation in H $_2$-O $_2$/He/Ar mixtures at elevated initial pressures
In this paper the formation of detonation in H \(_2\) -O \(_2\) /He/Ar mixtures at elevated initial pressures was investigated in an initiation t...
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Article
Detonation and deflagration initiation at the focusing of shock waves in combustible gaseous mixture
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Article
Effect of reflection type on detonation initiation at shock-wave focusing
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Article
Pressure measurements on cone surface in 3-D shock reflection processes
In a shock tube the pressure distribution was measured on a cone with an angle of attack when a shock wave passed the cone. The cone has a semi-apex angle of 35°, the angle of attack varied from 0° to 25° and...
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Article
Microwave detection of molecules formed by shock wave induced reactions
The paper describes experimental investigations in a shock tube concerning the formation of new molecules using He as a driver gas and a mixture of Kr, CH \(_4\) and NH ...
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Article
Behavior of detonation waves at low pressures
With respect to stability of gaseous detonations, unsteady behavior of gallo** detonations and re-initiation process of hydrogen-oxygen mixtures are studied using a detonation tube of 14 m in length and 45 ...
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Article
Shock waves from an open-ended shock tube with different shapes
A new method for decreasing the attenuation of a shock wave emerging from an open-ended shock tube exit into a large free space has been developed to improve the shock wave technique for cleaning deposits on t...
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Chapter and Conference Paper
Numerical Simulation of the Interaction of a Shock Wave with a Two-Phase Interface
The one-dimensional unsteady flow field induced by a planar incident shock wave propagating into a gas-particle mixture without chemical reactions has been calculated using the PLM-algorithm based on the high-...
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Chapter and Conference Paper
Six-Component Force Measurement in the Aachen Shock Tunnel
A six-component strain-gauge balance for short-duration hypersonic facilities is presented. The balance features a new geometry compared to classical strain-gauge balances for model measurements in wind tunnel...
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Chapter and Conference Paper
Navier-Stokes Simulation and Measurement of Cone Drag at M ∞ = 7.9
The calculation of a M ∞ = 7.9 flow around a 30° cone in a shock tunnel is presented. It starts from the initial reservoir conditions obtained in the experiment in fr...
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Chapter and Conference Paper
Shock Wave Diffraction — New Aspects of an Old Problem
The classical gas dynamics problem of a shock wave diffracting at a sharp 90° corner is investigated both numerically and experimentally. Recent improvements of the visualization techniques and a high-resoluti...
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Chapter and Conference Paper
Experiments and Model Computation of Cylindrical Shock Waves with Time-Resolved Deformation and Fragmentation
Since real converging shock waves are not perfectly symmetric at least a two-dimensional description of their properties is necessary, as can be seen, e.g., from the experiments of K. Takayama, H. Kleine and H...
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Article
Specific features of incident and reflected blast waves
On the basis of numerical modeling specific features of shock wave reflections were analyzed. It was found, that after diaphragm rupture self-modeling pressure and velocity distributions nearby the shock front...
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Article
Interaction of a shock wave with a two-phase interface
The acceleration by an incident shock of a planar interface between a gas and a particle-gas mixture has been investigated experimentally and numerically. The experiments were conducted in a newly developed ve...
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Article
Time integration method to determine the characteristic parameter of a light extinctiometer
The linear relation between the particle concentration and the output voltage of a light extinctiometer used to measure particle concentrations has been derived and calibrated. A time integration method was in...
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Chapter
Measurements on Models for Hypersonic Real Gas Conditions
Pressure and particularly heat transfer measurements on the surface of a model in the test section flow of a shock tunnel are discussed. The heat transfer gauges include thin films, thermocouples and calorimet...
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Chapter
A Six Component Balance for Short Duration Hypersonic Facilities
A new balance for six component forces measurements in short duration hypersonic facilities is presented. Construction and functioning of the system are described in detail. The third order calibration is expl...
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Article
Gaseous detonation driver for a shock tunnel
The concept of a shock tunnel with gaseous detonation driver is discussed. A detonation driver presents an alternative to a free-piston driver because comparable values of high enthalpy can be attained, howeve...
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Article
Propagation mechanism of dust detonations
This paper summarizes the studies on dust detonations at the Stosswellenlabor of RWTH Aachen since 1987. The onset and propagation mechanism of heterogeneous dust detonations are similar to those of marginal g...
