The design and testing of an injector for anadvanced hypergolic dual-mode propulsionsystem

An important topic in the field of rocket propulsion is the development of a new green advanced hypergolic rocket propulsion system. The current hypergolic propellants have one large drawback, namely the toxic properties. The injector has a crucial role in the performance of a liquid engine. Therefore, the next step in the development of this...

Numerical Investigation of Spray Formation in Air-Blast Atomizers: Numerical study of air-blast atomization using a hybrid volume of fluid/discrete phase solver

The conducted study investigates the potential of a newly released multi-phase solver to simulate atomization in liquid rocket injectors. The "VOF-to-DPM" solver was used to simulate primary and secondary atomization in an air-blast atomizer with a coaxial injector-like geometry. The solver uses a hybrid Eulerian/Eulerian-Lagrangian formulation...

Spray Characteristics in Gas / Liquid Pintle Injection

In Liquid Rocket Engine (LRE) design, knowledge of how the propellant atomization quality varies with respect to some injector design variables would be useful in predicting LRE performance. Three spray characteristics were chosen as a measure of Atomization quality: the Sauter Mean Diameter (SMD), the drop size distribution, and the cone angle....

Cryogenic propellant tank pressurization

To launch a rocket to the edge of space using a pressure fed rocket system with liquid oxygen as propellant, you need to know exactly how much pressurant gas (helium) you need to take along. In this thesis a practical investigation on cryogenic tank pressurization is conducted together with DARE. The measurement results are used to validate...

Designing a user interface for control of contrast fluid on the next generation Interventional X-Ray systems

Interventional radiology uses X-Ray imaging to help guide the physician when inserting catheters, wires, and other small instruments and tools into the body. The physician uses this technology to diagnose and/or treat conditions in almost any part of the body. To visualize vessels and to improve the quality of the images made using X-Ray images,...

A Universal Fault Injector for Structural Simulation Environments

Smaller feature size, greater chip density, and minimal power consumption all lead to an increased number of faults in computing systems. Among these faults are soft errors. They are mainly caused by incident radiation. When a particle strikes a semiconductor and deposits enough energy along its path, charge builds up and the transistor...

Distributed secondary gas injection via a fractal injector: A nature-inspired approach to improving conversion in fluidized bed reactors

The conversion in bubbling fluidized bed reactors is suppressed because the interphase mass transfer and gas-solid contact in bubbling fluidized bed reactors are often poor. Most of the gas is present in the form of bubbles, which have low surface-to-volume ratios and are nearly devoid of catalyst particles. The chaotic behaviour of the bubbles...

Investigation of the effect of two-components injectors arrangement on injecting rate in the combustion chamber of a liquid propellant engine

In liquid propellant engines, the propellants (fuel and oxidizer) after passing the injectors, are injected to combustion chamber. Generally, in liquid propellant engines, two types of injectors - direct flow and centrifugal flow - are used. The direct flow injector, actuates as an orifice. The input flow to a centrifugal injector, gets the...