Table of Contents
Why is water injection sometimes used in forced induction engines?
Water Injection is generally used in engines with high compression ratios (predominantly forced-induction powertrains) due to the potential adverse effects of such high compression within each cylinder. The reason for water injection is for its cooling properties.
What are the two basic methods of coolant injection into airflow?
There are two basic methods of injecting the coolant into the airflow. Some engines have the coolant sprayed directly into the compressor inlet, but the injection of coolant into the combustion chamber inlet is usually more suitable for axial flow compressor engines.
How does a water injection help in thrust augmentation on gas turbine engines?
Water Injection The liquid evaporates and cools the inlet airflow before it reaches the compressor. The brief temperature reduction allows the compressor to handle larger quantities of air to be used for combustion, which results in greater thrust.
How does water injection reduce NOx?
Because thermal NOx formation increases exponentially with temperature, small reductions in temperature will result in significant reductions of NOx. Water or steam injection into the flame area provides a heat sink that lowers the flame temperature and reduces thermal NOx formation.
Who invented water injection?
Water methanol injection was invented by Sir Harry Ricardo, a British engineer. It is my understanding that his book “The High Speed Internal Combustion Engine” was the definitive text on the topic of internal combustion engines in the 1930s and 40s.
Why is water injected into oil wells?
The principal reason for waterflooding an oil reservoir is to increase the oil-production rate and, ultimately, the oil recovery. This is accomplished by “voidage replacement”—injection of water to increase the reservoir pressure to its initial level and maintain it near that pressure.
Why thrust augmentation is required?
Thrust may decrease due to reduction of density, weight of fuel flow, Engine RPM, Amount of air bleed from the compressor. Then to have more thrust during take off, sharp manoeuvres, the required thrust must be obtain. This method is using in gas turbine engines.