STACK GEOMETRY EFFECTS ON FLOW PATTERN WITH PARTICLE IMAGE VELOCIMETRY (PIV)

ABSTRAC

Feasibility study of pulse detonation engine fueled by biogas

The hottest issue toward the environment today is t he Clean Development Mechanism (CDM) and Green House Gases (GHG) which influenced climate change. At the same time, the world is facing the crisis of limited reserves of petroleum-based fuel resource which is being continuously depleted. Therefore, these three issue s can possibly be overcome by using alternative fuels such as biogas, biodiesel, biomass, biofuel, alcohol, vegetable oils etc. The use of biogas as fuel for Pulse Detonation Engine (PDE) possibly promise great advantages on power production with less emission. This is because PDE operates with higher thermodynamic efficiency by operating on constant volume pressure. Biogas usage will somewhat contributed to the CDM and and lessen the GHG issues. Here through detailed literature review, the challenges such as lower flame speed (compared to hydrocarbon fuel) and biogas impurities are discussed. Combustion characteristics of biogas in detonation mode a re also investigated. Strategy is presented here f or looking at the possibility of PDE operation using biogas

Early assessment of asymmetric vortex small rotating detonation engine

Rotating Detonation Engine (RDE) has all the advantages including high-efficiency and high thrust density without compression stages for the future generation engine. Nevertheless, RDE is still at an infancy stage that need further study specifically to discover the best mixing scheme for combustion stability. Thus, the aim of this study is to develop and test the new mixing scheme of RDE using asymmetric vortex shape on small scale RDE to improve mixing and stability. Initiation strategy by using pre-detonator with 10bar of detonation pressure. RDE with asymmetric vortex shape was successfully operate with average pressure of 4.5bar and 6 kHz of frequency

Effects of firing mode on the performance of flameless combustion: a review

Flameless combustion is of a great interest since it simultaneously provides higher thermal efficiency together with controlling the pollutant emission such as NOX. This technology has been used to provide large energy savings in power system and industrial heating applications. In this technology, the preheat temperature of the combustion air must be higher than the auto-ignition temperature of the reactant mixture. In this review, papers concern the effect of firing mode to reduce pollutant emissions such as NOX emission and combustion efficiency for flameless combustion were reviewed. Summaries on the influences of the firing mode in the flameless combustion were presented, discussed and analyzed. The review concludes that all the previous studies have asserted that a parallel firing mode gives much lower pollutant emissions and high efficiency compared with staggered and counter modes

Pulse detonation engine research development at high speed reacting flow laboratory-hiref, Universiti Teknologi Malaysia

The Pulse detonation Engine (PDE) research program has been started at High Speed Reacting Flow Laboratory (HiREF), Universiti Teknologi Malaysia (UTM) since 2005. The studies began with a single pulse detonation study for detailed investigation of detonation characteristics of various fuels and followed by development of repetitive PDE engine, performance study and augmentation of thrust using various types of ejectors. This paper summarizes the laboratory facilities, research activities conducted and the output from all of the related research programs

Review of numerical studies on NO\u3csub\u3eX\u3c/sub\u3e emission in the flameless combustion

The incomplete process of combustion produces unwanted emission and one of the major pollutant in the combustion of fossil fuels is the formation of nitrogen oxides. To mitigate the problem various combustion technologies have been explored and flameless combustion is one of the potential candidate. Flameless combustion is of a great interest since it simultaneously provides higher thermal efficiency together with controlling the pollutant emission such as NOX. In this technology, the preheat temperature of the combustion air must be higher than the auto-ignition temperature of the reactant mixture. This paper explores various numerical studies performed on the flameless combustion and the role of flameless combustion on the reduction of NOX emission are presented. © (2013) Trans Tech Publications, Switzerland

Effects of firing mode on the performance of flameless combustion: A review

Flameless combustion is of a great interest since it simultaneously provides higher thermal efficiency together with controlling the pollutant emission such as NOX. This technology has been used to provide large energy savings in power system and industrial heating applications. In this technology, the preheat temperature of the combustion air must be higher than the autoignition temperature of the reactant mixture. In this review, papers concerning the effect of firing mode to reduce pollutant emissions such as NOX emission and combustion efficiency for flameless combustion were reviewed. Summaries on the influences of the firing mode in the flameless combustion were presented, discussed and analyzed. The review concludes that all the previous studies have asserted that a parallel firing mode gives much lower pollutant emissions and high efficiency compared with staggered and counter modes. © (2013) Trans Tech Publications, Switzerland

Review of numerical studies on nox emission in the flameless combustion

The incomplete process of combustion produces unwanted emission and one of the major pollutant in the combustion of fossil fuels is the formation of nitrogen oxides. To mitigate the problem various combustion technologies have been explored and flameless combustion is one of the potential candidate. Flameless combustion is of a great interest since it simultaneously provides higher thermal efficiency together with controlling the pollutant emission such as NOX. In this technology, the preheat temperature of the combustion air must be higher than the auto-ignition temperature of the reactant mixture. This paper explores various numerical studies performed on the flameless combustion and the role of flameless combustion on the reduction of NOX emission are presented

Pulse detonation engine research development at high speed reacting flow laboratory - hiref, Universiti Teknologi Malaysia

The Pulse detonation Engine (PDE) research program has been started at High Speed Reacting Flow Laboratory (HiREF), Universiti Teknologi Malaysia (UTM) since 2005. The studies began with a single pulse detonation study for detailed investigation of detonation characteristics of various fuels and followed by development of repetitive PDE engine, performance study and augmentation of thrust using various types of ejectors. This paper summarizes the laboratory facilities, research activities conducted and the output from all of the related research programs