Compressor Baffle for Pressure Relief Noise Reduction
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Solution Overview
Problem
Internal combustion engine supercharging assemblies experience noise generation during pressure relief, which is not effectively mitigated by existing technologies, leading to wear on the gas compressor and engine components.
Innovation Solution
A gas compressor assembly with a pressure relief valve and a baffle configured as a sleeve-ring within the compressor bypass to dissipate energy and reduce acoustic spikes upon initial opening, using materials like steel, aluminum, or high-temperature plastic to manage sound waves effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief valve is used to release excess pressure and prevent compressor surge, then reliability of the compressor and engine is improved, but noise is generated during pressure relief
Solution Approach 1:
A baffle is introduced as an intermediary component between the pressure relief valve and the compressor bypass. The baffle intercepts sound waves generated during pressure relief and directs them toward the bypass flow, where the kinetic energy of the flowing air dissipates the acoustic energy. This mediator approach allows the pressure relief function to continue while noise is actively managed through the intermediary structure.
Solution Approach 2:
The invention converts the harmful noise generated during pressure relief into a beneficial effect by directing sound waves through the bypass flow. The kinetic energy of the pressurized air in the bypass acts as a natural dissipation medium, transforming acoustic energy into kinetic energy transfer, thereby reducing noise propagation while utilizing the existing bypass flow as the conversion mechanism.
2Reliability
If the compressor bypass is opened to relieve pressure, then compressor surge is prevented, but acoustic spikes are generated upon initial opening
Solution Approach 1:
The baffle is pre-positioned in the compressor bypass before pressure relief occurs. This preliminary placement ensures that when the pressure relief valve opens and sound waves are generated, the baffle is already in position to intercept and redirect these waves toward the bypass flow. The preliminary action of positioning the noise management component before the harmful event occurs enables effective noise reduction without compromising surge prevention.
3Stress or pressure
If existing pressure relief technologies are used, then pressure control is achieved, but noise mitigation is not effective
Solution Approach 1:
The baffle serves as a noise management intermediary that does not interfere with the pressure control function of the existing pressure relief valve and bypass system. By positioning the baffle to intercept sound waves and redirect them toward the bypass flow, the invention adds noise mitigation capability while preserving the established pressure control mechanism, allowing both functions to operate effectively together.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly reduces noise and wear on the compressor and engine components by effectively dissipating energy from sound waves generated during pressure relief, enhancing the operational efficiency and longevity of the engine.
Implementation Method 1
A baffle arranged inside the compressor bypass is configured to dissipate energy of a sound wave and limit an acoustic spike generated by the pressurized airflow upon an initial opening of the pressure relief valve
Data Source
AI summary
A gas compressor assembly configured to pressurize an airflow received from the ambient for delivery to an internal combustion engine having a cylinder includes a compressor housing. A compressor wheel is disposed inside the compressor housing and configured to pressurize the airflow. A compressor bypass is configured to direct the pressurized airflow away from the cylinder. A pressure relief valve is configured to selectively open and close the compressor bypass to thereby limit pressure of the pressurized airflow and minimize surge of the compressor wheel. A baffle arranged inside the compressor bypass is configured to dissipate energy of a sound wave generated by the pressurized airflow upon an initial opening of the pressure relief valve. An internal combustion engine employing such a turbocharger is also disclosed.