Turbocharger Compressor Bypass Ejector Line for Transient Load Response
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Solution Overview
Problem
In turbocharged gaseous fueled engine systems, reintroducing excess compressed air/fuel mixture upstream of the compressor can lead to unstable and inefficient engine performance due to differences in fluid velocity and pressure, particularly during rapid engine load transitions.
Innovation Solution
A compressor bypass reintroduction system with a bypass conduit that maintains a constant hydraulic diameter and directs the excess air/fuel mixture close to the compressor inlet, reducing residence time and improving flow uniformity, which includes an ejector line configured to increase fluid velocity and reduce pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If excess air/fuel mixture is reintroduced at the compressor inlet, then loss of excess air/fuel charge is prevented, but unstable engine performance and inefficient operation occur due to fluid velocity and pressure differences
Solution Approach 1:
An intermediary system comprising a bypass conduit with ejector line and constant hydraulic diameter is introduced between the bypass source and compressor inlet. This intermediary maintains flow velocity and pressure characteristics, allowing effective reintroduction of excess air/fuel charge without causing instability in the compressor inlet flow
Solution Approach 2:
The bypass conduit is designed with constant hydraulic diameter to maintain specific flow parameters (velocity and pressure) of the excess air/fuel mixture during transport. This parameter control ensures the reintroduced flow does not create disruptive velocity or pressure differences at the compressor inlet, resolving the stability issue while preventing charge loss
2Adaptability or versatility
If bypass conduit length is increased to distribute flow to multiple compressors, then flow distribution is improved, but pressure loss and flow velocity degradation increase
Solution Approach 1:
The bypass conduit maintains constant hydraulic diameter along its entire length, including when distributing flow to multiple compressors. This design preserves flow velocity and pressure characteristics over extended distances and multiple branches, enabling versatile flow distribution without significant energy loss
Solution Approach 2:
The bypass conduit system is segmented into multiple ejector lines that can independently serve different compressors. Each segment maintains the constant hydraulic diameter design, allowing the system to adapt to multiple compressor configurations while minimizing cumulative pressure losses through optimized segment design
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
This solution enhances the aerodynamic performance of the compressor, reduces cyclic reversing loads, and minimizes resonance, thereby improving engine efficiency and extending the compressor's operating life.
Implementation Method 1
The ejector line is configured to increase fluid velocity and reduce pressure loss
Data Source
AI summary
A compressor bypass reintroduction system includes a compressor intake manifold and a bypass conduit. The compressor intake manifold defines a fluid plenum. The compressor intake manifold is engageable with a compressor. The bypass conduit extends into the fluid plenum and includes an ejector line. The ejector line is configured to be substantially collinear with the compressor and to discharge flow toward the compressor. In some embodiments, an outlet of the ejector is disposed proximate to an outlet of the fluid plenum that discharges flow into the compressor.